Vascular Plants
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Common names beginning with S:
640 common names
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Index to common names:
safflower, sage, sagebrush, sagewort, sago-pondweed, saintfoin, saitas, salal, salmonberry, salsify, saltbush, saltlover, saltwort, sand-verbena, sandbur, sandcarpet, sandfain, sandmat, sandspurry, sandweed, sandwort, sanicle, sarsaparilla, saskatoon, sawwort, saxifrage, scalepod, scheuchzeria, scorpion-weed, scorpiongrass, scorzonella, scratchgrass, scurf-pea, scurvygrass, sea-milkwort, sea-watch, seablite, seawrack, sedge, seepweed, serpent-grass, serpentweed, service-tree, serviceberry, seviceberry, sheepburr, shepherd's-purse, shootingstar, sibbaldia, sidalcea, sidebells, silene, silky-bent, silver-berry, silverback, silvercrown, silverpuffs, single-delight, skeletonplant, skeletonweed, skullcap, skullcapp, skyrocket, sleepydick, slipper, smartweed, smelowskia, smotherweed, snakeroot, snakeweed, snapdragon, sneezeweed, sneezweed, snout, snow-in-summer, snowberry, snowdrop, snowflake, soapberry, soapwort, soldier, soliva, Solomon's-seal, soopolallie, sorghum, sorrel, sowbane, Spanish-broom, spatterdock, spearmint, speedwell, spike-rush, spikemoss, spikerush, spinach, spine-flower, spineflower, spiraea, spleenwort, spoonwort, spring, springbeauty, spruce, spurge, spurge-laurel, spurry, square, squashberry, squaw-potato, squawcarpet, squirreltail, staggerweed, stalk, star, star-of-bethleham, starflower, stargrass, starthistle, starwort, steer's-head, stephanomeria, stichwort, stickseed, sticktight, sticky-starwort, sticky-willy, stinkgrass, stinkweed, stitchwort, stonecrop, stoneseed, stranvaesia, strawberry, strawberry-tomato, streptanthella, succory, sugarstick, sumac, suncup, sundew, sunflower, surf-grass, swamp, swampcandles, sweet-after-death, sweet-cicely, sweet-clover, sweet-vetch, sweetbrier, sweetflag, sweetgale, sweetgrass, swertia, sycamore
Safflower (Carthamus tinctorius)
Distribution: Escaped from cultivation in many western and mid-western states.
Habitat: Disturbed sites.
Origin: Introduced from the Mediterranean region, usually a waif
African sage (Salvia aethiopis)
Distribution: Introduced from the Mediterranean region to southwest United States, spreading north to eastern Oregon.
Habitat: A weed of dry waste places and roadsides.
Origin: Introduced from Europe
Prairie-meadow sage (Salvia pratensis)
Distribution: Scattered locations on both sides of the Cascades in Washington; escaping in parts of western, central, and eastern North America.
Habitat: Roadsides and other disturbed habitats.
Origin: Introduced
Wand sage (Salvia virgata)
Origin: Introduced from Europe
Prairie sagebrush (Artemisia frigida)
Distribution: Rocky Mountains and Great Plains states, occasionally in eastern Washington and British Columbia
Habitat: Dry, open plains and foothills
Origin: Native
Scabland sagebrush (Artemisia rigida)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to Oregon, east to Idaho and Montana.
Habitat: Dry, rocky places from the plains and foothills to moderate elevations in the mountains.
Origin: Native
Snowfield sagebrush (Artemisia spiciformis)
Origin: Native
Spiked sagebrush (Artemisia spiciformis)
Origin: Native
Stiff sagebrush (Artemisia rigida)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to Oregon, east to Idaho and Montana.
Habitat: Dry, rocky places from the plains and foothills to moderate elevations in the mountains.
Origin: Native
Douglas sagewort (Artemisia douglasiana)
Distribution: Occurring in Washington chiefly east of the Cascades crest, but also on the west side; widely distributed throughout much of North America.
Habitat: Mostly along stream banks and river bottoms.
Origin: Native
Dragon sagewort (Artemisia dracunculus)
Distribution: Occurring east of the Cascades crest in Washington; widely distributed throughout the central and western portions of North America.
Habitat: Shrub-steppe to dry, open areas at mid-elevations.
Origin: Native
Lemon sagewort (Artemisia michauxiana)
Distribution: British Columbia to California, east to Alberta and Wyoming.
Habitat: Rocky places in the mountains at rather high elevations.
Origin: Native
Prairie sagewort (Artemisia frigida)
Distribution: Rocky Mountains and Great Plains states, occasionally in eastern Washington and British Columbia
Habitat: Dry, open plains and foothills
Origin: Native
Suksdorf's sagewort (Artemisia suksdorfii)
Distribution: Occurring west of the Cascades crest in Washington, British Columbia south to California.
Habitat: Bluffs and rocky or sandy beaches, less commonly in other low, open places.
Origin: Native
Sweet sagewort (Artemisia annua)
Distribution: Native of Eurasia, naturalized in eastern United States, rare in the Pacific Northwest.
Habitat: Fields and waste places.
Origin: Introduced
Sago-pondweed (Stuckenia pectinata)
Distribution: Both sides of the Cascades in Washington; common throughout North America; Eurasia
Habitat: Shallow, fresh to brackish water.
Origin: Native
Saintfoin (Onobrychis viciifolia)
Distribution: Occasionally introduced in scattered locations throughout Washington; ranging throughout western North America and parts of central and eastern North America.
Habitat: Waste ground, disturbed soil.
Origin: Introduced
Northern saitas (Dichelostemma congestum)
Distribution: Scattered locations in Washington from the east side of the Olympic Peninsula and Island County to the Columbia River; Washington south to California.
Habitat: Grassy meadows, rocky prairies and sagebrush slopes.
Origin: Native
Salal (Gaultheria shallon)
Distribution: Chiefly in the Olympics and Cascades mountains in Washington; Alaska south to California.
Habitat: Woods, from sea level to moderate elevation in the mountains.
Origin: Native
Salmonberry (Rubus spectabilis)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to Idaho.
Habitat: Lowland moist woods and swamps to mid-elevations in the mountains.
Origin: Native
Meadow salsify (Tragopogon pratensis)
Distribution: Widely distributed throughout Washington; widely distributed throughout North America.
Habitat: Roadsides, fields and waste places, usually in slightly moist areas.
Origin: Introduced
Purple salsify (Tragopogon porrifolius)
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout most of North America.
Habitat: Roadsides, fields and waste places, usually where moist.
Origin: Introduced from Europe
Yellow salsify (Tragopogon dubius)
Distribution: Occurring chiefly east of the Cascades crest in Washington; widely distributed throughout most of North America.
Habitat: Drier areas at low to mid-elevations.
Origin: Introduced from Europe
Australian saltbush (Atriplex semibaccata)
Distribution: Occasionally introduced in eastern and central WA; scattered localities primarily in southwestern US.
Habitat: Disturbed areas from dry to moist, tolerant of alkaline soils.
Origin: Introduced from Australia
Baltic saltbush (Atriplex longipes)
Origin: Introduced
Berry saltbush (Atriplex semibaccata)
Distribution: Occasionally introduced in eastern and central WA; scattered localities primarily in southwestern US.
Habitat: Disturbed areas from dry to moist, tolerant of alkaline soils.
Origin: Introduced from Australia
Creeping saltbush (Atriplex semibaccata)
Distribution: Occasionally introduced in eastern and central WA; scattered localities primarily in southwestern US.
Habitat: Disturbed areas from dry to moist, tolerant of alkaline soils.
Origin: Introduced from Australia
Saline saltbush (Atriplex dioica)
Origin: Native
Saltlover (Halogeton glomeratus)
Origin: Introduced from Eurasia
Low saltwort (Salicornia depressa)
Origin: Native
Red glasswort saltwort (Salicornia rubra)
Origin: Native
Saltwort (Salicornia rubra)
Origin: Native
Honey-scented sand-verbena (Abronia mellifera)
Distribution: Distributed east of the Cascades in Washington in the Columbia Basin and along the Snake River; north-central Oregon, southeastern Oregon and adjacent Idaho, southeastern Idaho and adjacent Wyoming.
Habitat: Dunes and sandy soil at low elevations.
Origin: Native
Yellow sand-verbena (Abronia latifolia)
Distribution: West of the Cascades in Washington along the coast; Vancouver Island, British Columbia south to California.
Habitat: Coastal beaches and sand dunes.
Origin: Native
Coastal sandbur (Cenchrus spinifex)
Origin: Probably introduced from southern North America
Common sandbur (Cenchrus spinifex)
Origin: Probably introduced from southern North America
Longspine sandbur (Cenchrus longispinus)
Distribution: Eastern Washington, south to Mexico, east to much of the United States.
Habitat: Sandy river banks.
Origin: Introduced
Mat sandbur (Cenchrus longispinus)
Distribution: Eastern Washington, south to Mexico, east to much of the United States.
Habitat: Sandy river banks.
Origin: Introduced
Sandcarpet (Cardionema ramosissima)
Distribution: Along the coast in Washington; south to Mexico.
Habitat: Sandy beaches along the coast.
Origin: Native
Sandfain (Onobrychis viciifolia)
Distribution: Occasionally introduced in scattered locations throughout Washington; ranging throughout western North America and parts of central and eastern North America.
Habitat: Waste ground, disturbed soil.
Origin: Introduced
Rib seed sandmat (Euphorbia glyptosperma)
Distribution: Chiefly east of the Cascades in Washington; British Columbia south to California, east to Maine and Texas.
Habitat: Dry, sandy soil, from the plains to the lower mountains.
Origin: Native
Sandmat (Cardionema ramosissima)
Distribution: Along the coast in Washington; south to Mexico.
Habitat: Sandy beaches along the coast.
Origin: Native
Sandmat (Euphorbia maculata)
Distribution: Occurring on both sides of the Cascades in Washington; widely distributed throughout much of North America.
Habitat: Disturbed soil and waste areas.
Origin: Introduced from eastern North America
Alkali sandspurry (Spergularia diandra)
Origin: Introduced from Europe
Red sandspurry (Spergularia rubra)
Distribution: Occurring throughout Washington; introduced from Europe and common throughout North America.
Habitat: Weed of gardens, waste places, disturbed grasslands and forest openings.
Origin: Introduced from Europe
Saltmarsh sandspurry (Spergularia salina)
Distribution: Both coastal and inland populations in Washington; Native and introduced throughout North America.
Habitat: Saline or brackish areas along the coast, and alkaline areas inland.
Origin: Both Native and Introduced
Sandweed (Athysanus pusillus)
Distribution: Both sides of the Cascades in Washington; British Columbia south to California, east to Idaho.
Habitat: Dry, open, often grassy places.
Origin: Native
Alpine sandwort (Cherleria obtusiloba)
Origin: Native
Alpine sandwort (Cherleria obtusiloba)
Origin: Native
Annual sandwort (Minuartia pusilla)
Origin: Native
Basalt sandwort (Sabulina basaltica)
Origin: Native
Blunt-leaf sandwort (Moehringia lateriflora)
Distribution: Occurring on both sides of the Cascades in Washington, though more common east of the crest; occurring throughout much of North America except along the southern U.S. boundary.
Habitat: Forest understory and edge, open meadows.
Origin: Native
Bluntleaf sandwort (Moehringia lateriflora)
Distribution: Occurring on both sides of the Cascades in Washington, though more common east of the crest; occurring throughout much of North America except along the southern U.S. boundary.
Habitat: Forest understory and edge, open meadows.
Origin: Native
Dwarf sandwort (Minuartia pusilla)
Origin: Native
Large-leaf sandwort (Moehringia macrophylla)
Distribution: Both sides of the Cascades, east to the Atlantic Coast
Habitat: Moist to dry, shaded to open woods, meadows and rocky slopes in the mountains
Origin: Native
Marsh sandwort (Arenaria paludicola)
Origin: Native
Needle-leaf sandwort (Eremogone aculeata)
Distribution: Known from Kittitas County in Washington; Beaverhead County, Montana, to northeast Oregon, south to Nevada, Utah, and northeast California.
Habitat: Gravelly sagebrush-covered hills at 6000 feet elevation to rocky alpine slopes.
Origin: Native
Olympic sandwort (Sabulina basaltica)
Origin: Native
Prickly sandwort (Eremogone aculeata)
Distribution: Known from Kittitas County in Washington; Beaverhead County, Montana, to northeast Oregon, south to Nevada, Utah, and northeast California.
Habitat: Gravelly sagebrush-covered hills at 6000 feet elevation to rocky alpine slopes.
Origin: Native
Slender sandwort (Minuartia tenella)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to Oregon.
Habitat: Lowlands, prairies and coastal bluffs.
Origin: Native
Twin Sisters sandwort (Sabulina sororia)
Origin: Native
Two-flowered sandwort (Cherleria biflora)
Origin: Native
Bear's-foot sanicle (Sanicula arctopoides)
Distribution: Along the coast in Washington; Vancouver Island, B.C. south along the coast to California.
Habitat: Maritime species of coastal bluffs and meadows.
Origin: Native
Purple sanicle (Sanicula bipinnatifida)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia south to California.
Habitat: Uncommon at low to moderate elevations in dry, open areas.
Origin: Native
Wild sarsaparilla (Aralia nudicaulis)
Distribution: Occurring in northeastern region of Washington; Eastern British Columbia, east to the Atlantic Coast, and south in the mountains to Colorado.
Habitat: Moist, shaded soil.
Origin: Native
Saskatoon (Amelanchier alnifolia)
Distribution: Occurring throughout Washington; Alaska to California, east to the Dakotas and New Mexico.
Habitat: Open woods, canyons and hillsides, sea level to subalpine.
Origin: Native
Saskatoon (Amelanchier alnifolia)
Distribution: Occurring throughout Washington; Alaska to California, east to the Dakotas and New Mexico.
Habitat: Open woods, canyons and hillsides, sea level to subalpine.
Origin: Native
Saskatoon (Amelanchier alnifolia)
Distribution: Occurring throughout Washington; Alaska to California, east to the Dakotas and New Mexico.
Habitat: Open woods, canyons and hillsides, sea level to subalpine.
Origin: Native
Saskatoon (Amelanchier alnifolia)
Distribution: Occurring throughout Washington; Alaska to California, east to the Dakotas and New Mexico.
Habitat: Open woods, canyons and hillsides, sea level to subalpine.
Origin: Native
Serviceberry; saskatoon (Amelanchier alnifolia)
Distribution: Occurring throughout Washington; Alaska to California, east to the Dakotas and New Mexico.
Habitat: Open woods, canyons and hillsides, sea level to subalpine.
Origin: Native
American sawwort (Saussurea americana)
Distribution: Occurring in the Olympic and Cascade Mountains of Washington; Yukon Territory south to California, east to Alberta, Montana, and Idaho.
Habitat: Meadows and open, often rocky slopes, where moist, at mid- to high elevations in the mountains.
Origin: Native
Alpine saxifrage (Micranthes tolmiei)
Distribution: Occurring in the Olympic and Cascade mountains in Washington; Alaska south to California, east to Idaho, Montana, Nevada and Utah.
Habitat: Mountain meadows, scree, and rock crevices at moderate to high elevations.
Origin: Native
Bog saxifrage (Micranthes oregana)
Distribution: Both sides of the Cascades crest in Washington; Washington south to California, east to Alberta, Montana, Idaho, Nevada, and Colorado.
Habitat: Bogs, streambanks and wet meadows at mid-elevations in the mountains.
Origin: Native
Bog saxifrage (Micranthes oregana)
Distribution: Both sides of the Cascades crest in Washington; Washington south to California, east to Alberta, Montana, Idaho, Nevada, and Colorado.
Habitat: Bogs, streambanks and wet meadows at mid-elevations in the mountains.
Origin: Native
Brook saxifrage (Micranthes odontoloma)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Streambanks, lake shores and wet meadows from the lower mountains to the alpine.
Origin: Native
Clayton's saxifrage (Micranthes fragosa)
Distribution: East of Cascades in Washington, south to Oregon and east to Idaho.
Habitat: Wet slopes and cliffs, often near watercourses.
Origin: Native
Columbia saxifrage (Micranthes nidifica)
Distribution: East of the crest of the Cascades, British Columbia south to northeast California, east to Idaho and Nevada.
Habitat: Prairies and wet banks to subalpine meadows.
Origin: Native
Columbian saxifrage (Micranthes integrifolia)
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia south to California.
Habitat: Prairies, grassy slopes and vernally moist areas, sea level to subalpine.
Origin: Native
Gorman's saxifrage (Micranthes gormanii)
Origin: Native
Idaho saxifrage (Micranthes idahoensis)
Distribution: Washington and Oregon, east to Montana and Idaho.
Habitat: Exposed areas, ledges, and open slopes.
Origin: Native
Idaho saxifrage (Micranthes idahoensis)
Distribution: Washington and Oregon, east to Montana and Idaho.
Habitat: Exposed areas, ledges, and open slopes.
Origin: Native
Leatherleaf saxifrage (Leptarrhena pyrolifolia)
Distribution: Alaska to Oregon, east to Alberta and Montana; in the Olympics and Cascades of Washington
Habitat: Streambanks, seeps and wet meadows, mid- to high elevations in the mountains
Origin: Native
Lyall's saxifrage (Micranthes lyallii)
Distribution: On both sides of the Cascades in Washington; Alaska south to the north Cascades of Washington, east to western Alberta, and south in the Rocky Mountains to Montana and Idaho.
Habitat: Wet, gravelly meadows and along streams and ponds at high elevations.
Origin: Native
Lyall's saxifrage (Micranthes lyallii)
Distribution: On both sides of the Cascades in Washington; Alaska south to the north Cascades of Washington, east to western Alberta, and south in the Rocky Mountains to Montana and Idaho.
Habitat: Wet, gravelly meadows and along streams and ponds at high elevations.
Origin: Native
Matted saxifrage (Saxifraga vespertina)
Distribution: West of the Cascades crest in Washington; Washington south to Oregon.
Habitat: Rocky outcroppings.
Origin: Native
Merten's saxifrage (Saxifraga mertensiana)
Distribution: Distributed on both sides of the Cascades in Washington; Alaska south to California, east to Idaho and Montana.
Habitat: Wet ledges and gravelly streambanks, sea level to subalpine.
Origin: Native
Mountain saxifrage (Micranthes occidentalis)
Distribution: Both sides of the Cascades in Washington; Alaska south to Oregon and Nevada, east to Saskatachewan and south to New Mexico.
Habitat: Dry to wet open areas, rock crevices, meadows, and streambanks from moderate to high elevations in the mountains.
Origin: Native
Nodding saxifrage (Saxifraga cernua)
Distribution: Known only east of the Cascades crest in north-central Washington; Alaska south to California, east to the Rocky Mountains and across northern Canada to the Atlantic Coast.
Habitat: Among rocks in alpine areas, often where moist.
Origin: Native
Nuttall's saxifrage (Cascadia nuttallii)
Distribution: Grays Harbor and Pacific counties in Washington; Washington south along the Oregon coast to Curry County, Oregon.
Habitat: Wet banks and near waterfalls, usually growing in moss.
Origin: Native
Nuttall's saxifrage (Cascadia nuttallii)
Distribution: Grays Harbor and Pacific counties in Washington; Washington south along the Oregon coast to Curry County, Oregon.
Habitat: Wet banks and near waterfalls, usually growing in moss.
Origin: Native
Olympic saxifrage (Micranthes tischii)
Distribution: Olympic Peninsula endemic
Habitat: Forested ledges and rock crevices where moist.
Origin: Native
Olympic saxifrage (Micranthes tischii)
Distribution: Olympic Peninsula endemic
Habitat: Forested ledges and rock crevices where moist.
Origin: Native
Oregon saxifrage (Micranthes oregana)
Distribution: Both sides of the Cascades crest in Washington; Washington south to California, east to Alberta, Montana, Idaho, Nevada, and Colorado.
Habitat: Bogs, streambanks and wet meadows at mid-elevations in the mountains.
Origin: Native
Pygmy saxifrage (Saxifraga hyperborea)
Distribution: In the Olympic and Cascade mountains of Washington; Alaska south to California, throughout the Rocky Mountains, across northern Canada to the Maritime Provinces.
Habitat: Alpine tundra, often where moist with rocky outcroppings, crevices, and snowmelt.
Origin: Native
Red-stemmed saxifrage (Micranthes lyallii)
Distribution: On both sides of the Cascades in Washington; Alaska south to the north Cascades of Washington, east to western Alberta, and south in the Rocky Mountains to Montana and Idaho.
Habitat: Wet, gravelly meadows and along streams and ponds at high elevations.
Origin: Native
Red-stemmed saxifrage (Micranthes lyallii)
Distribution: On both sides of the Cascades in Washington; Alaska south to the north Cascades of Washington, east to western Alberta, and south in the Rocky Mountains to Montana and Idaho.
Habitat: Wet, gravelly meadows and along streams and ponds at high elevations.
Origin: Native
Redwool saxifrage (Micranthes occidentalis)
Distribution: Both sides of the Cascades in Washington; Alaska south to Oregon and Nevada, east to Saskatachewan and south to New Mexico.
Habitat: Dry to wet open areas, rock crevices, meadows, and streambanks from moderate to high elevations in the mountains.
Origin: Native
Rue-leaved saxifrage (Saxifraga tridactylites)
Origin: Introduced
Rusty saxifrage (Micranthes ferruginea)
Distribution: In the Olympics and Cascades mountains in Washington; Alaska to south California, east to Idaho, Montana, and Wyoming.
Habitat: Open, moist, often rocky areas, low to mid-elevations in the mountains.
Origin: Native
Rusty saxifrage (Micranthes ferruginea)
Distribution: In the Olympics and Cascades mountains in Washington; Alaska to south California, east to Idaho, Montana, and Wyoming.
Habitat: Open, moist, often rocky areas, low to mid-elevations in the mountains.
Origin: Native
Rusty saxifrage (Micranthes ferruginea)
Distribution: In the Olympics and Cascades mountains in Washington; Alaska to south California, east to Idaho, Montana, and Wyoming.
Habitat: Open, moist, often rocky areas, low to mid-elevations in the mountains.
Origin: Native
Rusty-hair saxifrage (Micranthes rufidula)
Distribution: Both sides of the Cascades in Washington; British Columbia south to California.
Habitat: Wet open areas, ledges, rock outcroppings from moderate to high elevations in the mountains.
Origin: Native
Spotted saxifrage (Saxifraga vespertina)
Distribution: West of the Cascades crest in Washington; Washington south to Oregon.
Habitat: Rocky outcroppings.
Origin: Native
Strawberry saxifrage (Saxifragopsis fragarioides)
Distribution: Western United States.
Origin: Native
Streambank saxifrage (Micranthes odontoloma)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Streambanks, lake shores and wet meadows from the lower mountains to the alpine.
Origin: Native
Swamp saxifrage (Micranthes integrifolia)
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia south to California.
Habitat: Prairies, grassy slopes and vernally moist areas, sea level to subalpine.
Origin: Native
Swamp saxifrage (Micranthes nidifica)
Distribution: East of the crest of the Cascades, British Columbia south to northeast California, east to Idaho and Nevada.
Habitat: Prairies and wet banks to subalpine meadows.
Origin: Native
Tiny swamp saxifrage (Micranthes apetala)
Distribution: East of the Cascades crest in Washington; Washington south to Oregon, east to Idaho and Montana.
Habitat: Vernally moist meadows at low to moderate elevations.
Origin: Native
Tolmie's alpine saxifrage (Micranthes tolmiei)
Distribution: Occurring in the Olympic and Cascade mountains in Washington; Alaska south to California, east to Idaho, Montana, Nevada and Utah.
Habitat: Mountain meadows, scree, and rock crevices at moderate to high elevations.
Origin: Native
Tolmie's saxifrage (Micranthes tolmiei)
Distribution: Occurring in the Olympic and Cascade mountains in Washington; Alaska south to California, east to Idaho, Montana, Nevada and Utah.
Habitat: Mountain meadows, scree, and rock crevices at moderate to high elevations.
Origin: Native
Tufted alpine saxifrage (Saxifraga cespitosa)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to south California, east to the Rocky Mountains; east across Canada to the Atlantic Coast.
Habitat: Ledges, gravelly ridges and scree, near sea level to alpine.
Origin: Native
Tufted saxifrage (Saxifraga cespitosa)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to south California, east to the Rocky Mountains; east across Canada to the Atlantic Coast.
Habitat: Ledges, gravelly ridges and scree, near sea level to alpine.
Origin: Native
Wedge-leaf saxifrage (Saxifraga adscendens)
Origin: Native
Wedge-leaved saxifrage (Saxifraga adscendens)
Origin: Native
Western saxifrage (Micranthes occidentalis)
Distribution: Both sides of the Cascades in Washington; Alaska south to Oregon and Nevada, east to Saskatachewan and south to New Mexico.
Habitat: Dry to wet open areas, rock crevices, meadows, and streambanks from moderate to high elevations in the mountains.
Origin: Native
Western saxifrage (Micranthes occidentalis)
Distribution: Both sides of the Cascades in Washington; Alaska south to Oregon and Nevada, east to Saskatachewan and south to New Mexico.
Habitat: Dry to wet open areas, rock crevices, meadows, and streambanks from moderate to high elevations in the mountains.
Origin: Native
Western swamp saxifrage (Micranthes apetala)
Distribution: East of the Cascades crest in Washington; Washington south to Oregon, east to Idaho and Montana.
Habitat: Vernally moist meadows at low to moderate elevations.
Origin: Native
Whole-leaf saxifrage (Micranthes integrifolia)
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia south to California.
Habitat: Prairies, grassy slopes and vernally moist areas, sea level to subalpine.
Origin: Native
Woodland saxifrage (Saxifraga mertensiana)
Distribution: Distributed on both sides of the Cascades in Washington; Alaska south to California, east to Idaho and Montana.
Habitat: Wet ledges and gravelly streambanks, sea level to subalpine.
Origin: Native
Scalepod (Idahoa scapigera)
Distribution: East of the Cascades in Washington; Washington sout to California, east to Idaho.
Habitat: Shrub-steppe, especially with sagebrush.
Origin: Native
Scheuchzeria (Scheuchzeria palustris)
Distribution: Southern Alaska south to northern California, east to Labrador and New Jersey.
Habitat: In bogs or on lake margins.
Origin: Native
Bolander's scorpion-weed (Phacelia bolanderi)
Distribution: Disjunct in Pacific and Wahkiakum counties, Washington; Coos Bay, Oregon south along the coast to Sonoma County, California.
Habitat: Mostly on open, often unstable slopes at low elevations.
Origin: Native
Changeable scorpion-weed (Phacelia mutabilis)
Distribution: Occurring in scattered locations in Washington; Washington south to California, east to Nevada.
Habitat: Open areas at middle elevations.
Origin: Native
Dwarf scorpion-weed (Phacelia minutissima)
Distribution: Uncommon; known from the type locality in Idaho, the Wallowa Mountains of Oregon, Elko County, Nevada, and Kittitas County, Washington.
Habitat: Moderate elevations in the mountains.
Origin: Native
Four-part yellow scorpion-weed (Phacelia tetramera)
Origin: Native
Franklin's scorpion-weed (Phacelia franklinii)
Origin: Native
Glandular-hair scorpion-weed (Phacelia glandulifera)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Idaho, Nevada, Utah, and Wyoming.
Habitat: Open areas in sagebrush-steppe habitat.
Origin: Native
Sticky scorpion-weed (Phacelia lenta)
Distribution: Endemic to Columbia Basin of central Washington.
Habitat: Open rocky habitats, talus, rocky outcrops.
Origin: Native
Tall scorpion-weed (Phacelia procera)
Distribution: Chiefly in the East Cascades Mountains of Washington; south to the northern Sierra and Coast Ranges of California; also in the Blue Mountains of Oregon and adjacent Idaho.
Habitat: Meadows and lightly wooded slopes at moderate elevations in the mountains.
Origin: Native
Thread-leaf scorpion-weed (Phacelia linearis)
Distribution: Chiefly east of the Cascades in Washington; British Columbia to California, east to Utah.
Habitat: Common in dry, open places in the foothills and plains to moderate elevations in the mountains
Origin: Native
Blue scorpiongrass (Myosotis stricta)
Distribution: Introduced over most of northern United States and southern Canada; in Washington, chiefly east of the Cascades, where fairly common.
Habitat: Roadsides, stream banks, and moist to dry open places.
Origin: Introduced from Eurasia
Early scorpiongrass (Myosotis verna)
Origin: Native
Field scorpiongrass (Myosotis arvensis)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to Oregon, east across the northern half of North America to the Atlantic Coast.
Habitat: Fields, roadsides, wastelots, and forest openings, typically associated with disturbance.
Origin: Introduced from Europe
Spring scorpiongrass (Myosotis verna)
Origin: Native
White scorpiongrass (Myosotis verna)
Origin: Native
Yellow and blue scorpiongrass (Myosotis discolor)
Distribution: Introduced in Washington to California, east to Montana, and along the East Coast
Habitat: Roadsides, dry to moist open areas
Origin: Introduced from Europe
Yellow scorpiongrass (Myosotis discolor)
Distribution: Introduced in Washington to California, east to Montana, and along the East Coast
Habitat: Roadsides, dry to moist open areas
Origin: Introduced from Europe
Nodding scorzonella (Microseris nutans)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains and South Dakota.
Habitat: Open areas to open forests, somewhat moist places, low to mid-elevations.
Origin: Native
Scratchgrass (Muhlenbergia asperifolia)
Distribution: British Columbia south, east of the Cascades, to California, east to Montana and Texas.
Habitat: Dry to moist alkaline places.
Origin: Native
Scurf-pea (Laedeania lanceolata)
Distribution: East of the Cascades in Washington, mostly in the central and southcentral areas of the state; Washington south to California, east to the central regions of Canada and the U.S.
Habitat: Sagebrush steppe habitat in dry areas, often where sandy.
Origin: Native
Danish scurvygrass (Cochlearia groenlandica)
Origin: Native
Scurvygrass (Barbarea verna)
Origin: Introduced from Eurasia
Scurvygrass (Cochlearia groenlandica)
Origin: Native
Sea-milkwort (Lysimachia maritima)
Distribution: circumboreal, Alaska to California, east to Newfoundland, south in eastern North America to Virginia.
Habitat: Coastal tideflats and saline areas.
Origin: Native
Sea-watch (Angelica lucida)
Distribution: West of the Cascades in Washington; margin of the Pacific Basin, from the Kuril Islands to California.
Habitat: Coastal bluffs and beaches in the Pacific Northwest, occasionally inland elsewhere.
Origin: Native
Common seablite (Suaeda calceoliformis)
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout North America from Alaska south to California, east to the Great Plains, and also along the coast of eastern North America.
Habitat: Open, moist to wet areas, typically where saline.
Origin: Native
Horned seablite (Suaeda calceoliformis)
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout North America from Alaska south to California, east to the Great Plains, and also along the coast of eastern North America.
Habitat: Open, moist to wet areas, typically where saline.
Origin: Native
Slender seablite (Suaeda occidentalis)
Distribution: Eastern Washington to northern Nevada, east through southern Idaho to Colorado.
Habitat: Saline or alkaline flats and marshes in sagebrush area.
Origin: Native
Seawrack (Zostera marina)
Distribution: Widely distributed along the Washington coastline; Alaska south to California along the coast; also on the Atlantic Coast.
Habitat: Sub-tidal area.
Origin: Native
Alaska long-awn sedge (Carex macrochaeta)
Origin: Native
Alpine nerve sedge (Carex neurophora)
Origin: Native
Analogue sedge (Carex simulata)
Origin: Native
Awned sedge (Carex atherodes)
Origin: Native
Back's sedge (Carex backii)
Origin: Native
Beaked sedge (Carex utriculata)
Origin: Native
Bearded sedge (Carex comosa)
Distribution: Widespread in eastern United States, occasional in Washington, Idaho and Montana
Habitat: Marshes and wet meadows from the lowlands to moderate elevations in the mountains
Origin: Native
Bebb's sedge (Carex bebbii)
Origin: Native
Big inflated sedge (Carex exsiccata)
Origin: Native
Big-leaf sedge (Carex amplifolia)
Distribution: British Columbia to California, east to Idaho and the Steens Mountains of Oregon
Habitat: Swamps, bogs and other wet places, lowlands to moderate elevations in the mountains
Origin: Native
Bighead sedge (Carex macrocephala)
Distribution: Occurring in counties along the Puget Sound and outer coast in Washington; Alaska south to Oregon; northern Pacific Rim.
Habitat: Sandy saltwater beaches and dunes.
Origin: Native
Black alpine sedge (Carex nigricans)
Origin: Native
Black bog sedge (Carex pluriflora)
Origin: Native
Black-and-white-scaled sedge (Carex albonigra)
Distribution: Occurring in the Cascade and Olympic mountains of Washington; Alaska south to California, east to the Rocky Mountains.
Habitat: Alpine areas, high elevation talus and scree.
Origin: Native
Black-scale sedge (Carex atrosquama)
Origin: Native
Blunt sedge (Carex obtusata)
Origin: Native
Bolander's sedge (Carex bolanderi)
Origin: Native
Brewer's sedge (Carex breweri)
Distribution: In the Olympic and Cascade Mountains of Washington; Washington south to California, east to Nevada.
Habitat: Open slopes, ridges, and rocky areas of the subalpine and alpine.
Origin: Native
Bristle-leaf sedge (Isolepis setacea)
Origin: Introduced
Bristly sedge (Carex comosa)
Distribution: Widespread in eastern United States, occasional in Washington, Idaho and Montana
Habitat: Marshes and wet meadows from the lowlands to moderate elevations in the mountains
Origin: Native
Brown bog sedge (Carex buxbaumii)
Origin: Native
Buxbaum's sedge (Carex buxbaumii)
Origin: Native
California sedge (Carex californica)
Origin: Native
Capitate sedge (Carex capitata)
Distribution: Occurring in northwestern and north-central Washington near the Canadian border; Alaska south to California and Nevada (but not in Oregon), east to the Rocky Mountains in the U.S. and east across Canada to the Atlantic Coast; circumboreal.
Habitat: Alpine slopes.
Origin: Native
Clustered field sedge (Carex praegracilis)
Origin: Native
Coiled sedge (Carex circinata)
Origin: Native
Columbia sedge (Carex aperta)
Origin: Native
Common woolly sedge (Scirpus atrocinctus)
Distribution: Known only from Whatcom County in Washington; British Columbia south to Washington, east across the northern half of North America to the Atlantic Coast.
Habitat: Wet, low ground.
Origin: Native
Constance's sedge (Carex davyi)
Origin: Native
Cordilleran sedge (Carex cordillerana)
Origin: Native
Cordroot sedge (Carex chordorrhiza)
Origin: Native
Crawe's sedge (Carex crawei)
Origin: Native
Crawford's sedge (Carex crawfordii)
Origin: Native
Creeping sedge (Carex chordorrhiza)
Origin: Native
Cusick's sedge (Carex cusickii)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Idaho, Montana, and Wyoming.
Habitat: Wetlands, lake and pond edges, and other wet areas.
Origin: Native
Davy's sedge (Carex davyi)
Origin: Native
Delicate sedge (Carex leptalea)
Origin: Native
Dense sedge (Carex densa)
Origin: Native
Different-veined sedge (Carex heteroneura)
Distribution: Occurring along the Canadian border in Washington; British Columbia south to California, east to Sasketchewan and Rocky Mountains.
Habitat: Moist to wet sites in the subalpine and alpine zones.
Origin: Native
Douglas' sedge (Carex douglasii)
Distribution: Chiefly east of the Cascades in Washington; British Columbia south to California, east to central North America.
Habitat: Dry to wet soils in sagebrush grasslands, riparian zones, and forest margins.
Origin: Native
Dry-spike sedge (Carex siccata)
Origin: Native
Elk sedge (Carex geyeri)
Distribution: East of the Cascades, British Columbia to California, east to Colorado
Habitat: Open woodlands and dry meadows, foothills to moderate elevations in the mountains
Origin: Native
European woodland sedge (Carex sylvatica)
Origin: Introduced
False golden sedge (Carex hassei)
Origin: Native
Foetid sedge (Carex vernacula)
Origin: Native
Foothill sedge (Carex tumulicola)
Origin: Native
Fox sedge (Carex vulpinoidea)
Distribution: Much of the United States and southern Canada; chiefly east of the Cascades in Washington
Habitat: Marshes and standing water, lowlands and foothills
Origin: Native
Fragile-sheath sedge (Carex fracta)
Origin: Native
Garber's sedge (Carex hassei)
Origin: Native
Geyer's sedge (Carex geyeri)
Distribution: East of the Cascades, British Columbia to California, east to Colorado
Habitat: Open woodlands and dry meadows, foothills to moderate elevations in the mountains
Origin: Native
Golden sedge (Carex aurea)
Distribution: Across Canada, south to California and Pennsylvania
Habitat: Moist or wet places from the lowlands to near timberline in the mountains
Origin: Native
Grassy-slope arctic sedge (Carex anthoxanthea)
Distribution: Known from along the coast in Washington; Alaska south to Washington.
Habitat: Bogs and wet meadows from low to moderate elevations.
Origin: Native
Green-fruited sedge (Carex interrupta)
Distribution: Along the Columbia River from Douglas County through Klickitat County, south in Oregon west of the Cascades
Habitat: Rocky banks and streambeds, and other low, wet places
Origin: Native
Green-sheath sedge (Carex feta)
Distribution: West of the Cascades, British Columbia to California
Habitat: Marshes and wet meadows from the lowlands to moderate elevations in the mountains
Origin: Native
Hair sedge (Carex capillaris)
Origin: Native
Halfchaff sedge (Lipocarpha aristulata)
Distribution: Occurring along the Columbia River in central and south-central Washington; Washington to California and Arizona, east in Great Plains and central U.S.
Habitat: sandy soils of shorelines, stream banks, ponds, and ditches.
Origin: Native
Halfchaff sedge (Lipocarpha aristulata)
Distribution: Occurring along the Columbia River in central and south-central Washington; Washington to California and Arizona, east in Great Plains and central U.S.
Habitat: sandy soils of shorelines, stream banks, ponds, and ditches.
Origin: Native
Hall's sedge (Carex halliana)
Origin: Native
Hare sedge (Carex leporina)
Origin: Native
Henderson's sedge (Carex hendersonii)
Distribution: West of the Cascades, British Columbia to California
Habitat: Boggy areas and wet woods, low to mid-elevations in the mountains
Origin: Native
Hood's sedge (Carex hoodii)
Origin: Native
Inflated sedge (Carex utriculata)
Origin: Native
Inflated sedge (Carex vesicaria)
Origin: Native
Inland sedge (Carex interior)
Origin: Native
Interrupted sedge (Carex interrupta)
Distribution: Along the Columbia River from Douglas County through Klickitat County, south in Oregon west of the Cascades
Habitat: Rocky banks and streambeds, and other low, wet places
Origin: Native
Japanese sedge (Carex kobomugi)
Origin: Introduced
Jelly bean sedge (Carex leptalea)
Origin: Native
Jones' sedge (Carex jonesii)
Origin: Native
Lake Tahoe sedge (Carex tahoensis)
Origin: Native
Lesser panicled sedge (Carex diandra)
Origin: Native
Lesser tussock sedge (Carex diandra)
Origin: Native
Liddon's sedge (Carex petasata)
Origin: Native
Limestone sedge (Carex saxatilis)
Origin: Native
Livid sedge (Carex livida)
Origin: Native
Long's sedge (Carex longii)
Origin: Introduced
Long-style sedge (Carex stylosa)
Distribution: Alaska to Clallam County, Washington, east across Canada to Labrador
Habitat: Usually near the coast
Origin: Native
Lyngbye's sedge (Carex lyngbyei)
Distribution: Circumboreal along the seacoasts; south to northern California in our area
Habitat: Coastal marches and tidal flats
Origin: Native
Many-fruit sedge (Carex angustata)
Distribution: Chiefly east of the Cascades crest in Washington; Washington south to California, east to Idaho.
Habitat: Wet meadows in riparian zones from low to moderate elevations.
Origin: Native
Many-headed sedge (Carex sychnocephala)
Origin: Native
Mertens' sedge (Carex mertensii)
Distribution: Alaska south in the mountains and the coast ranges of Oregon to northwest California
Habitat: Wet, open or shaded areas from the lowlands to near timberline
Origin: Native
Montana sedge (Carex media)
Origin: Native
Mountain hare sedge (Carex phaeocephala)
Origin: Native
Mt. Adams sedge (Carex engelmannii)
Origin: Native
Mt. Shasta sedge (Carex straminiformis)
Origin: Native
Mud sedge (Carex limosa)
Origin: Native
Nebraska sedge (Carex nebrascensis)
Distribution: East of the Cascades, Washington to California, east to Kansas
Habitat: Wet meadows and other wet areas, often in alkaline areas, lowlands to moderate elevations in the mountains
Origin: Native
Northern beaked sedge (Carex rostrata)
Distribution: Alaska to Washington, east to Montana, and in the Great Lakes region
Habitat: Sphagnum bogs
Origin: Native
Northern bog sedge (Carex gynocrates)
Origin: Native
Northern clustered sedge (Carex arcta)
Origin: Native
Northern meadow sedge (Carex praticola)
Origin: Native
Northwest Territory sedge (Carex utriculata)
Origin: Native
Northwestern sedge (Carex concinnoides)
Origin: Native
One-sided sedge (Carex unilateralis)
Origin: Native
Oval broom sedge (Carex leporina)
Origin: Native
Oval sedge (Carex leporina)
Origin: Native
Oxbow sedge (Carex vesicaria)
Origin: Native
Pacific bog sedge (Kobresia myosuroides)
Origin: Native
Pale green sedge (Carex pallescens)
Origin: Both native and introduced
Pale sedge (Carex livida)
Origin: Native
Pendulous sedge (Carex pendula)
Origin: Introduced
Plains oval sedge (Carex brevior)
Origin: Native
Porcupine sedge (Carex hystericina)
Origin: Native
Presl's sedge (Carex preslii)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Alberta, Idaho, and Montana.
Habitat: Open, dry to seasonally dry areas from montane to alpine.
Origin: Native
Pumpkin sedge (Carex aurea)
Distribution: Across Canada, south to California and Pennsylvania
Habitat: Moist or wet places from the lowlands to near timberline in the mountains
Origin: Native
Raynolds' sedge (Carex raynoldsii)
Origin: Native
Retrorse sedge (Carex retrorsa)
Origin: Native
Rope-root sedge (Carex chordorrhiza)
Origin: Native
Ross' sedge (Carex rossii)
Origin: Native
Russet sedge (Carex saxatilis)
Origin: Native
Rusty sedge (Carex subfusca)
Origin: Native
Sand sedge (Carex pansa)
Distribution: Along the coast in Washington; Washington south to California.
Habitat: Dunes, meadows, and other open areas along the coast.
Origin: Native
Scandinavian sedge (Carex media)
Origin: Native
Sheldon's sedge (Carex sheldonii)
Origin: Native
Short-beaked sedge (Carex brevior)
Origin: Native
Short-leaf sedge (Carex disperma)
Origin: Native
Short-scaled sedge (Carex leptopoda)
Origin: Native
Short-stemmed sedge (Carex zikae)
Origin: Native
Showy sedge (Carex spectabilis)
Distribution: Alaska to California, east to Alberta and Montana
Habitat: Damp meadows and other wet places, mid- to high elevations in the mountains
Origin: Native
Sierra hare sedge (Carex leporinella)
Origin: Native
Slender-beak sedge (Carex athrostachya)
Origin: Native
Slenderfoot sedge (Carex leptopoda)
Origin: Native
Slough sedge (Carex obnupta)
Distribution: West of the Cascades, British Columbia to California
Habitat: Standing water or saturated soil, coastal swamps and along rivers
Origin: Native
Small-head sedge (Carex illota)
Origin: Native
Small-winged sedge (Carex microptera)
Distribution: Occurring on both sides of the Cascades crest in Washington; Yukon Territory south to Mexico, east to the Rocky Mountains.
Habitat: Moist to dry meadows and streambanks.
Origin: Native
Smoky Mountain sedge (Carex proposita)
Origin: Native
Smooth-beaked sedge (Carex integra)
Smooth-fruited sedge (Carex heteroneura)
Distribution: Occurring along the Canadian border in Washington; British Columbia south to California, east to Sasketchewan and Rocky Mountains.
Habitat: Moist to wet sites in the subalpine and alpine zones.
Origin: Native
Smooth-fruited sedge (Carex heteroneura)
Distribution: Occurring along the Canadian border in Washington; British Columbia south to California, east to Sasketchewan and Rocky Mountains.
Habitat: Moist to wet sites in the subalpine and alpine zones.
Origin: Native
Smooth-stemmed sedge (Carex laeviculmis)
Origin: Native
Sparse-flower sedge (Carex tenuiflora)
Origin: Native
Spikenard sedge (Carex nardina)
Distribution: In the Olympics and Cascades of Washington;
Habitat: Alpine rocky outcroppings, slopes, and ridges.
Origin: Native
Spikenard sedge (Carex nardina)
Distribution: In the Olympics and Cascades of Washington;
Habitat: Alpine rocky outcroppings, slopes, and ridges.
Origin: Native
Spring sedge (Carex luzulina)
Origin: Native
Spring sedge (Carex luzulina)
Origin: Native
Teacher's sedge (Carex praeceptorum)
Origin: Native
Tetrastigmatic sedge (Carex concinnoides)
Origin: Native
Thick-head sedge (Carex pachystachya)
Origin: Native
Timberline sedge (Carex micropoda)
Origin: Native
Torrent sedge (Carex nudata)
Origin: Native
Valley sedge (Carex vallicola)
Origin: Native
Walking sedge (Eleocharis rostellata)
Origin: Native
Weak-veined sedge (Carex infirminervia)
Origin: Native
Western halfchaff sedge (Lipocarpha occidentalis)
Origin: Native
Western halfchaff sedge (Lipocarpha occidentalis)
Origin: Native
Wheat sedge (Carex atherodes)
Origin: Native
Wide-fruited sedge (Carex angustata)
Distribution: Chiefly east of the Cascades crest in Washington; Washington south to California, east to Idaho.
Habitat: Wet meadows in riparian zones from low to moderate elevations.
Origin: Native
Woodrush sedge (Carex luzulina)
Origin: Native
Woodrush sedge (Carex luzulina)
Origin: Native
Woodrush sedge (Carex luzulina)
Origin: Native
Woolly sedge (Carex pellita)
Distribution: Widely distributed on both sides of the Cascades crest in Washington; widely distributed throughout North America except southeastern U.S.
Habitat: Wet to dry meadows from low elevations to montane.
Origin: Native
Yellow sedge (Carex flava)
Origin: Native
Yellow-flowered sedge (Carex anthoxanthea)
Distribution: Known from along the coast in Washington; Alaska south to Washington.
Habitat: Bogs and wet meadows from low to moderate elevations.
Origin: Native
Yellow-green sedge (Carex flava)
Origin: Native
Zika's sedge (Carex zikae)
Origin: Native
Bushy seablite seepweed (Suaeda nigra)
Origin: Native
Seepweed (Suaeda nigra)
Origin: Native
Western seepweed (Suaeda occidentalis)
Distribution: Eastern Washington to northern Nevada, east through southern Idaho to Colorado.
Habitat: Saline or alkaline flats and marshes in sagebrush area.
Origin: Native
Serpent-grass (Bistorta vivipara)
Distribution: Occurring on both sides of the Cascades in northern Washington; Alaska south to Oregon, east to Montana, and south in the Rockies to New Mexico; across Canada to Newfoundland, south to Minnesota and Maine.
Habitat: Damp areas, shady woods, meadows and streambanks at mid- to high elevations in the mountains.
Origin: Native
Lyall's serpentweed (Tonestus lyallii)
Distribution: Occurring in the Olympics and Cascades mountains in Washington; British Columbia south to California, east to Alberta, south to Colorado.
Habitat: Mountain meadows and rocky slopes, alpine and subalpine.
Origin: Native
Swedish service-tree (Sorbus hybrida)
Origin: Introduced
Cusick's serviceberry (Amelanchier alnifolia)
Distribution: Occurring throughout Washington; Alaska to California, east to the Dakotas and New Mexico.
Habitat: Open woods, canyons and hillsides, sea level to subalpine.
Origin: Native
Saskatoon serviceberry (Amelanchier alnifolia)
Distribution: Occurring throughout Washington; Alaska to California, east to the Dakotas and New Mexico.
Habitat: Open woods, canyons and hillsides, sea level to subalpine.
Origin: Native
Utah serviceberry (Amelanchier utahensis)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to Baja California, east to the Rocky Mountains.
Habitat: Rimrock, valleys, gullies and hillsides, from sagebrush desert to mid-elevations in the mountains.
Origin: Native
Utah serviceberry (Amelanchier utahensis)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to Baja California, east to the Rocky Mountains.
Habitat: Rimrock, valleys, gullies and hillsides, from sagebrush desert to mid-elevations in the mountains.
Origin: Native
Western serviceberry (Amelanchier alnifolia)
Distribution: Occurring throughout Washington; Alaska to California, east to the Dakotas and New Mexico.
Habitat: Open woods, canyons and hillsides, sea level to subalpine.
Origin: Native
Western serviceberry (Amelanchier alnifolia)
Distribution: Occurring throughout Washington; Alaska to California, east to the Dakotas and New Mexico.
Habitat: Open woods, canyons and hillsides, sea level to subalpine.
Origin: Native
Western serviceberry (Amelanchier alnifolia)
Distribution: Occurring throughout Washington; Alaska to California, east to the Dakotas and New Mexico.
Habitat: Open woods, canyons and hillsides, sea level to subalpine.
Origin: Native
Humptulips western seviceberry (Amelanchier alnifolia)
Distribution: Occurring throughout Washington; Alaska to California, east to the Dakotas and New Mexico.
Habitat: Open woods, canyons and hillsides, sea level to subalpine.
Origin: Native
Bristly sheepburr (Lappula squarrosa)
Distribution: Occurring east of the Cascades crest in Washington; widely distributed throughout much of North America; Eurasia.
Habitat: Shrub-steppe, disturbed areas, roadside.
Origin: Introduced; from Eurasia, possibly native in northern Rocky Mts. (Cronquist et al. 1984)
Shepherd's-purse (Capsella bursa-pastoris)
Distribution: Widely distributed throughout Washington; widely distributed throughout North America.
Habitat: Weed of disturbed ground.
Origin: Introduced from Europe
Alpine shootingstar (Dodecatheon alpinum)
Distribution: Known from south-central portion of Washington; Washington south to California, east to Utah and Arizona.
Habitat: Moist to wet areas in the mountains.
Origin: Native
Poet's shootingstar (Dodecatheon poeticum)
Distribution: From around Satus Creek, Yakima County, Washington, to Klickitat and Skamania Counties, south to Wasco and Hood River Counties, Oregon.
Habitat: Grassy slopes to drier woods, usually where vernally moist, often near seeps or springs along basaltic outcrops.
Origin: Native
Tundra shootingstar (Dodecatheon austrofrigidum)
Habitat: Moist basaltic slopes, cliff faces, in coniferous forests along streams, or in alpine meadows.
Origin: Native
Creeping sibbaldia (Sibbaldia procumbens)
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout western North America and northeastern North America; circumboreal.
Habitat: Open, dry to moist subalpine and alpine slopes.
Origin: Native
Meadow sidalcea (Sidalcea campestris)
Distribution: Native only to the Willamette Valley area (Multnomah and Washington to Benton and Linn counties). Introduced as a garden plant in western Washington, but rarely persisting.
Habitat: Dry fields and roadsides.
Origin: Introduced
Sidebells (Orthilia secunda)
Distribution: Alaska to California, east to New Mexico in the west, and across the northern half of the United States to the Atlantic
Habitat: Common in coniferous woods at moderate to mid-elevationn in the mountains
Origin: Native
Creeping silene (Silene repens)
Origin: Native
Parry's silene (Silene parryi)
Distribution: Widely distributed across Washington; Alaska south to Oregon, east in the mountains to Montana and Utah.
Habitat: Open areas, mid- to high elevations in the mountains.
Origin: Native
Seely's silene (Silene seelyi)
Distribution: Wenatchee Mountains, Kittitas and Chelan Counties, Washington.
Habitat: Cliffs and talus slopes at moderate to mid-elevations in the mountains.
Origin: Native
Spalding's silene (Silene spaldingii)
Distribution: Occurring in southeastern counties of Washington; southeastern Washington to adjacent northeastern Oregon and western Idaho, also in western Montana.
Habitat: Sagebrush, scabland and ponderosa pine forests.
Origin: Native
Dense silky-bent (Apera interrupta)
Distribution: Occurring chiefly east of the Cascades in Washington; British Columbia south to Oregon, east to Idaho and Montana.
Habitat: Dry wasteland and other disturbed areas in shrub-steppe and open coniferous forests.
Origin: Introduced
American silver-berry (Elaeagnus commutata)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Quebec, south into Idaho, Montana and Utah.
Habitat: Gravel benches and scabland, commonly along watercourses.
Origin: Native
False silverback (Rainiera stricta)
Distribution: Occurring on both sides of the Cascades crest in south-central Washington; Washington south to Oregon.
Habitat: Meadows and moist, open hillsides at mid- to high elevations in the mountains.
Origin: Native
Littleleaf silverback (Luina hypoleuca)
Distribution: In the Olympic and Cascade mountains in Washington; British Columbia south to California.
Habitat: Open, rocky areas, moist to somewhat dry, moderate to high elevations in the mountains.
Origin: Native
Tall silvercrown (Cacaliopsis nardosmia)
Distribution: Occurring chiefly east of the Cascades in Washington; British Columbia south to California.
Habitat: Meadows and open forests, moderately dry.
Origin: Native
Coastal silverpuffs (Microseris bigelovii)
Origin: Native, extirpated in WA
Lindley's false silverpuffs (Uropappus lindleyi)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to Idaho, south to Texas.
Habitat: Open hillsides, forest openings, from low to mid-elevations.
Origin: Native
Nodding silverpuffs (Microseris nutans)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains and South Dakota.
Habitat: Open areas to open forests, somewhat moist places, low to mid-elevations.
Origin: Native
Northern silverpuffs (Microseris borealis)
Distribution: Occurring west of the Cascades crest in Washington; southern Alaska south to northern California.
Habitat: Sphagnum bogs and wet meadows in the mountains.
Origin: Native
Single-delight (Moneses uniflora)
Distribution: Distributed on both sides of the Cascades in Washington; Alaska south to California, east to the Rocky Mountains and in eastern North America.
Habitat: Moist woods with high-humas soils, sea level to mid-elevations in the mountains.
Origin: Native
Rush skeletonplant (Lygodesmia juncea)
Distribution: Known from Spokane County in Washington; southeastern British Columbia to eastern Washington, Idaho and Nevada, east to Great Plains and Great Lakes region.
Habitat: Dry, open places, often in sandy soil.
Origin: Native
Rush skeletonweed (Chondrilla juncea)
Distribution: Occurring chiefly east of the Cascades in Washington; British Columbia south to California and east to Montana; also occurring in eastern North America.
Habitat: Dry, light soil, rangeland and roadsides.
Origin: Introduced from Eurasia
Thorny skeletonweed (Pleicanthus spinosus)
Origin: Introduced?
Hooded skullcap (Scutellaria galericulata)
Distribution: Both sides of the Cascades in Washington; circumboreal, extending south to California, Arizona and Missouri.
Habitat: Wet meadows and similar habitats at moderate elevations.
Origin: Native
Mad-dog skullcap (Scutellaria lateriflora)
Distribution: Both sides of the Cascades in Washington; occurring throughout North America.
Habitat: Moist bottomlands and meadows, low to moderate elevations.
Origin: Native
Marsh skullcapp (Scutellaria galericulata)
Distribution: Both sides of the Cascades in Washington; circumboreal, extending south to California, Arizona and Missouri.
Habitat: Wet meadows and similar habitats at moderate elevations.
Origin: Native
Small-flower skyrocket (Microgilia minutiflora)
Origin: Native
Sleepydick (Ornithogalum umbellatum)
Distribution: Distributed in scattered locations throughout Washington; occurring chiefly in central and eastern United States, with scattered locations in western states.
Habitat: Roadsides, open forests, waste places.
Origin: Introduced from Eurasia
Fairy slipper (Cypripedium parviflorum)
Distribution: Occurring east of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains; throughout most of Canada and the central, southeastern, and northeastern regions of the U.S.
Habitat: Bogs and damp woods.
Origin: Native
Yellow lady's-slipper slipper (Cypripedium parviflorum)
Distribution: Occurring east of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains; throughout most of Canada and the central, southeastern, and northeastern regions of the U.S.
Habitat: Bogs and damp woods.
Origin: Native
Bog smartweed (Persicaria setacea)
Origin: Native
Bog smartweed (Persicaria setacea)
Origin: Native
Dock-leaf smartweed (Persicaria lapathifolia)
Distribution: Widely distributed throughout Washington; widely distributed throughout all of North America.
Habitat: Streambanks, pond and lakeshores and other wet places.
Origin: Native
Dotted smartweed (Persicaria punctata)
Distribution: Occurring mostly in south-central Washington; British Columbia south to California, east to the Atlantic Coast.
Habitat: Lake and pond shores, marshes, and wet forests.
Origin: Native
Pale smartweed (Persicaria lapathifolia)
Distribution: Widely distributed throughout Washington; widely distributed throughout all of North America.
Habitat: Streambanks, pond and lakeshores and other wet places.
Origin: Native
Smartweed (Persicaria hydropiper)
Distribution: Introduced weed found in much of North America and throughout the Pacific Northwest.
Habitat: Swamps, ditches, and other wet places, mostly at low elevations.
Origin: Introduced
Swamp smartweed (Persicaria hydropiperoides)
Distribution: Chiefly west of the Cascades in Washington; British Columbia south to Mexico and South America, east across North America to the Atlantic coast.
Habitat: Moist to swampy areas, often growing in mud, from the lowlands to the lower mountain valleys.
Origin: Native
Swamp smartweed (Persicaria hydropiperoides)
Distribution: Chiefly west of the Cascades in Washington; British Columbia south to Mexico and South America, east across North America to the Atlantic coast.
Habitat: Moist to swampy areas, often growing in mud, from the lowlands to the lower mountain valleys.
Origin: Native
Water smartweed (Persicaria amphibia)
Distribution: Widely distributed throughout Washington; distributed throughout North America and worldwide.
Habitat: Wet soil, often partially submersed.
Origin: Native
Water smartweed (Persicaria amphibia)
Distribution: Widely distributed throughout Washington; distributed throughout North America and worldwide.
Habitat: Wet soil, often partially submersed.
Origin: Native
Water smartweed (Persicaria amphibia)
Distribution: Widely distributed throughout Washington; distributed throughout North America and worldwide.
Habitat: Wet soil, often partially submersed.
Origin: Native
Water smartweed (Persicaria punctata)
Distribution: Occurring mostly in south-central Washington; British Columbia south to California, east to the Atlantic Coast.
Habitat: Lake and pond shores, marshes, and wet forests.
Origin: Native
Alpine smelowskia (Smelowskia americana)
Distribution: In the Olympic and Cascades mountains in Washington; British Columbia and Alberta south to Nevada, east to the Rocky Mountains.
Habitat: Rocky areas at high elevations in the mountains.
Origin: Native
Alpine smelowskia (Smelowskia americana)
Distribution: In the Olympic and Cascades mountains in Washington; British Columbia and Alberta south to Nevada, east to the Rocky Mountains.
Habitat: Rocky areas at high elevations in the mountains.
Origin: Native
Short-fruited smelowskia (Smelowskia ovalis)
Distribution: In the Cascades Mountains in Washington; British Columbia south to California.
Habitat: Rocky crevices, moraines, ridges and talus slopes in alpine and sup-alpine regions.
Origin: Native
Short-fruited smelowskia (Smelowskia ovalis)
Distribution: In the Cascades Mountains in Washington; British Columbia south to California.
Habitat: Rocky crevices, moraines, ridges and talus slopes in alpine and sup-alpine regions.
Origin: Native
Siberian smelowskia (Smelowskia americana)
Distribution: In the Olympic and Cascades mountains in Washington; British Columbia and Alberta south to Nevada, east to the Rocky Mountains.
Habitat: Rocky areas at high elevations in the mountains.
Origin: Native
Siberian smelowskia (Smelowskia americana)
Distribution: In the Olympic and Cascades mountains in Washington; British Columbia and Alberta south to Nevada, east to the Rocky Mountains.
Habitat: Rocky areas at high elevations in the mountains.
Origin: Native
Fivehorn smotherweed (Bassia hyssopifolia)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains and Great Plains.
Habitat: Noxious weed of waste areas and irrigated farm land.
Origin: Introduced from Eurasia
Western snakeroot (Ageratina occidentalis)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Idaho and Utah.
Habitat: Rocky places at various altitudes.
Origin: Native
Western snakeroot (Ageratina occidentalis)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Idaho and Utah.
Habitat: Rocky places at various altitudes.
Origin: Native
Broom snakeweed (Gutierrezia sarothrae)
Distribution: East of the Cascades in Washington, chiefly in southeastern part of state; Alberta to Manitoba, south to California and Texas.
Habitat: Dry, open places in the foothills, valleys and plains.
Origin: Native
Garden snapdragon (Antirrhinum majus)
Distribution: Occasionally escaped from cultivation in western Washington.
Habitat: Disturbed areas in urban settings.
Origin: Introduced from Europe
Greater snapdragon (Antirrhinum majus)
Distribution: Occasionally escaped from cultivation in western Washington.
Habitat: Disturbed areas in urban settings.
Origin: Introduced from Europe
Lesser snapdragon (Antirrhinum orontium)
Distribution: Occasionally escaped from cultivation in western Washington.
Habitat: Disturbed areas in urban settings.
Origin: Introduced
Common sneezeweed (Helenium autumnale)
Distribution: British Columbia to Quebec, south to Arizona and Florida
Habitat: Stream banks and other moist, low ground in the valleys and foothills.
Origin: Native
Common sneezeweed (Helenium autumnale)
Distribution: British Columbia to Quebec, south to Arizona and Florida
Habitat: Stream banks and other moist, low ground in the valleys and foothills.
Origin: Native
Large flowered sneezeweed (Helenium autumnale)
Distribution: British Columbia to Quebec, south to Arizona and Florida
Habitat: Stream banks and other moist, low ground in the valleys and foothills.
Origin: Native
Large flowered sneezeweed (Helenium autumnale)
Distribution: British Columbia to Quebec, south to Arizona and Florida
Habitat: Stream banks and other moist, low ground in the valleys and foothills.
Origin: Native
Mountain sneezweed (Helenium autumnale)
Distribution: British Columbia to Quebec, south to Arizona and Florida
Habitat: Stream banks and other moist, low ground in the valleys and foothills.
Origin: Native
Weasel's snout (Antirrhinum orontium)
Distribution: Occasionally escaped from cultivation in western Washington.
Habitat: Disturbed areas in urban settings.
Origin: Introduced
Snow-in-summer (Cerastium tomentosum)
Distribution: Occasionally escaping cultivation in lowland northwestern Washington; British Columbia to Oregon, east across northern U.S. and southern Canada to Atlantic Coast.
Habitat: Fields, roadsides, waste sites.
Origin: Introduced
Western snowberry (Symphoricarpos occidentalis)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to Utah, east to the Atlantic Coast.
Habitat: Prairies, forest margins, and bottomlands from low to mid-elevations.
Origin: Native
Snowdrop (Galanthus nivalis)
Distribution: Garden escape in northeastern United States and adjacent Canada; occasional in western Washington.
Habitat: Abandoned gardens, roadsides, open forests.
Origin: Introduced from Europe
Summer snowflake (Leucojum aestivum)
Origin: Introduced from Europe
Soapberry (Shepherdia canadensis)
Distribution: Both sides of the Cascades in Washington; Alaska to Oregon, east to the Atlantic Coast.
Habitat: Moderately dry, open to wooded areas, sea level to mid-elevations in the mountains.
Origin: Native
Rock soapwort (Saponaria ocymoides)
Distribution: Garden plant, occasionally escaping but rarely persistent, in the Pacific Coast states and a few states in eastern United States.
Habitat: Old gardens, waste sites and rocky places.
Origin: Introduced from Europe
Shaggy soldier (Galinsoga quadriradiata)
Distribution: Introduced and sparingly established in western Washington; occurring throughout most of North America except intermountain west from Idaho to Texas.
Habitat: Gardens and waste places.
Origin: Introduced from Central and South America
Common soliva (Soliva sessilis)
Distribution: Known from western Washington, Oregon, and British Columbia
Habitat: Disturbed areas, roadsides, lawns
Origin: Introduced from South America
Prickly soliva (Soliva sessilis)
Distribution: Known from western Washington, Oregon, and British Columbia
Habitat: Disturbed areas, roadsides, lawns
Origin: Introduced from South America
Star-flowered Solomon's-seal (Maianthemum stellatum)
Distribution: Widely distributed throughout Washington; widely distributed throughout much of North America.
Habitat: Moist woods and streambanks to open, rocky hillsides.
Origin: Native
Two-leaf false Solomon's-seal (Maianthemum dilatatum)
Distribution: Chiefly west of the Cascades in Washington; Alaska south to California, east to northern Idaho.
Habitat: Shady, moist areas, open to dense woods, sea level to moderate elevations in the mountains.
Origin: Native
Soopolallie (Shepherdia canadensis)
Distribution: Both sides of the Cascades in Washington; Alaska to Oregon, east to the Atlantic Coast.
Habitat: Moderately dry, open to wooded areas, sea level to mid-elevations in the mountains.
Origin: Native
Sorghum (Sorghum bicolor)
Origin: Introduced from Africa
Alpine sorrel (Rumex paucifolius)
Origin: Native
Common sheep sorrel (Rumex acetosella)
Distribution: Introduced and common in most of the world.
Habitat: Along highways, railroads, and in waster areas, but also in open or lightly wooded undisturbed areas, from the lowlands to moderate elevations in the mountains.
Origin: Introduced
Garden sorrel (Rumex acetosa)
Distribution: Introduced in scattered locations in North America; occasional in British Columbia, western Washington and Oregon, and northcentral Montana.
Habitat: Disturbed soil and wasteland.
Origin: Introduced
Sowbane (Chenopodium murale)
Distribution: Introduced throughout most of North America.
Habitat: Roadsides and waste areas.
Origin: Introduced from Europe
Spanish-broom (Spartium junceum)
Distribution: West of the Cascades in Washington; Washington south to California
Habitat: Disturbed areas, roadsides, forest margins.
Origin: Introduced
Spatterdock (Nuphar polysepala)
Distribution: Widely distributed throughout Washington; Alaska south to northern California, east to Alberta and Colorado.
Habitat: Ponds, shallow lakes and sluggish streams.
Origin: Native
Spearmint (Mentha spicata)
Distribution: Both sides of the Cascades in Washington; widespread throughout all of North America.
Habitat: Banks of streams and ditches and other damp places.
Origin: Introduced
Alpine speedwell (Veronica wormskjoldii)
Distribution: Both sides of the Cascades in Washington; Alaska to California, east to Montana, Colorado and New Mexico.
Habitat: Moist ground and seeps, mid- to high elevations in the mountains.
Origin: Native
American alpine speedwell (Veronica wormskjoldii)
Distribution: Both sides of the Cascades in Washington; Alaska to California, east to Montana, Colorado and New Mexico.
Habitat: Moist ground and seeps, mid- to high elevations in the mountains.
Origin: Native
American speedwell (Veronica americana)
Distribution: Widely distributed throughout Washington; widely distributed throughout most of North America except southeast corner of U.S.
Habitat: Wet places, lowlands to moderate elevations in the mountains.
Origin: Native
Bilobed speedwell (Veronica biloba)
Origin: Introduced
Bird-eye speedwell (Veronica persica)
Distribution: Widely introduced in North America, occasional in the Pacific Northwest.
Habitat: Lawns and waste ground.
Origin: Introduced from Europe
Blue water speedwell (Veronica anagallis-aquatica)
Distribution: Occurring chiefly east of the Cascades crest in Washington; widely distributed throughout much of North America.
Habitat: In or along slow-moving streams in the lowlands.
Origin: Introduced from Europe
Chain speedwell (Veronica catenata)
Distribution: Widespread in the United States and Canada; occasional at lower elevations in the Pacific Northwest.
Habitat: Slow-moving streams and ditches.
Origin: Introduced from Europe
Common speedwell (Veronica officinalis)
Distribution: Occurring chiefly west of the Cascades crest in Washington; widely distributed throughout much of the northern half of North America and the southeastern U.S.
Habitat: Weed of wastelots, and other disturbed open and forested areas.
Origin: Introduced from Europe
Corn speedwell (Veronica arvensis)
Distribution: Introduced in much of North America; uncommon in the Pacific Northwest
Habitat: Disturbed ground, gardens and roadsides
Origin: Introduced from Eurasia
Cusick's speedwell (Veronica cusickii)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Idaho and Montana.
Habitat: Open, moist, rocky slopes at high elevations in the mountains.
Origin: Native
Finger speedwell (Veronica triphyllos)
Origin: Introduced from Europe
Germander speedwell (Veronica chamaedrys)
Distribution: Introduced chiefly west of the Cascades; more common in eastern United States
Habitat: Disturbed ground, lawns and gardens
Origin: Introduced from Europe
Grass-leaf speedwell (Veronica scutellata)
Distribution: The northern two-thirds of the temperate zone in North America; also in Eurasia.
Habitat: Wet places, from the lowlands to moderate elevations in the mountains.
Origin: Native
Hairy speedwell (Veronica wormskjoldii)
Distribution: Both sides of the Cascades in Washington; Alaska to California, east to Montana, Colorado and New Mexico.
Habitat: Moist ground and seeps, mid- to high elevations in the mountains.
Origin: Native
Herbal speedwell (Veronica officinalis)
Distribution: Occurring chiefly west of the Cascades crest in Washington; widely distributed throughout much of the northern half of North America and the southeastern U.S.
Habitat: Weed of wastelots, and other disturbed open and forested areas.
Origin: Introduced from Europe
Ivy-leaf speedwell (Veronica hederifolia)
Distribution: Occurring in scattered locations in Washington; British Columbia south to Oregon and Utah; other scattered locations in central and eastern North America.
Habitat: Waste places, disturbed soil.
Origin: Introduced
Long-leaf speedwell (Veronica longifolia)
Origin: Introduced from Europe
Marsh speedwell (Veronica scutellata)
Distribution: The northern two-thirds of the temperate zone in North America; also in Eurasia.
Habitat: Wet places, from the lowlands to moderate elevations in the mountains.
Origin: Native
Persian speedwell (Veronica persica)
Distribution: Widely introduced in North America, occasional in the Pacific Northwest.
Habitat: Lawns and waste ground.
Origin: Introduced from Europe
Skullcap speedwell (Veronica scutellata)
Distribution: The northern two-thirds of the temperate zone in North America; also in Eurasia.
Habitat: Wet places, from the lowlands to moderate elevations in the mountains.
Origin: Native
Thread-stalk speedwell (Veronica filiformis)
Distribution: Introduced west of the Cascades, British Columbia to California, and in Idaho; and Michigan to New York, south to West Virginia in the east
Habitat: Weed of lawns and gardens
Origin: Introduced
Two-lobe speedwell (Veronica biloba)
Origin: Introduced
Wall speedwell (Veronica arvensis)
Distribution: Introduced in much of North America; uncommon in the Pacific Northwest
Habitat: Disturbed ground, gardens and roadsides
Origin: Introduced from Eurasia
Dwarf spike-rush (Eleocharis coloradoensis)
Origin: Native
Few-flowered spike-rush (Eleocharis quinqueflora)
Distribution: Circumboreal, south in North America to California and New Jersey.
Habitat: Bogs and other wet places, from the lowlands to high elevations in the mountains.
Origin: Native
Cliff spikemoss (Selaginella scopulorum)
Origin: Native
Festoon spikemoss (Selaginella oregana)
Origin: Native
Oregon spikemoss (Selaginella oregana)
Origin: Native
Rocky Mountain spikemoss (Selaginella scopulorum)
Origin: Native
Wallace's spikemoss (Selaginella wallacei)
Distribution: British Columbia through central Oregon to California, east to Montana
Habitat: Exposed, terrestrial, often rocky sites, such as pocket of soil in ledges and cliffs
Origin: Native
Beaked spikerush (Eleocharis rostellata)
Origin: Native
Blunt spikerush (Eleocharis obtusa)
Origin: Native
Common spikerush (Eleocharis palustris)
Distribution: Widespread in temperate amd cold-temperate regions of the Northern hemisphere; common in the Pacific Northwest.
Habitat: Wet places from sea level to moderate elevations in the mountains; tolerant of alkali.
Origin: Native
Creeping spikerush (Eleocharis macrostachya)
Origin: Native
Engelman spikerush (Eleocharis engelmannii)
Distribution: Widespread in the northern hemisphere; found throughout the Pacific Northwest.
Habitat: Marshes and other wet places, from sea level to moderate elevations in the mountains.
Origin: Native
Little-head spikerush (Eleocharis parvula)
Distribution: Vancouver Island, British Columbia, to Newfoundland, south to northern South America.
Habitat: Wet, saline or alkaline soils.
Origin: Native
Needle spikerush (Eleocharis acicularis)
Distribution: Circumboreal, south to Florida and Mexico, found in the Pacific Northwest.
Habitat: Marshes, muddy shores, and other wet places.
Origin: Native
Ovoid spikerush (Eleocharis ovata)
Distribution: Widespread in the Northern Hemisphere; found throughout the Pacific Northwest.
Habitat: Marshes and other wet places, from sea level to moderate elevagtions in the mountains.
Origin: Native
Pretty spikerush (Eleocharis bella)
Origin: Native
Purple spikerush (Eleocharis atropurpurea)
Origin: Native
Suksdorf spikerush (Eleocharis suksdorfiana)
Origin: Native
French spinach (Atriplex hortensis)
Distribution: Occurring east of the Cascades crest in Washington; Alaska south to California, east to the Great Plains and in scattered locations in eastern North America.
Habitat: Disturbed areas, often where seasonally moist.
Origin: Introduced from Asia
Spinach (Spinacia oleracea)
Origin: Introduced from the Mediterranean
Watson's spine-flower (Chorizanthe watsonii)
Origin: Native
Five-tooth spineflower (Chorizanthe watsonii)
Origin: Native
False spiraea (Sorbaria sorbifolia)
Origin: Introduced
Gian false spiraea (Sorbaria kirilowii)
Origin: Introduced
Giant false spiraea (Sorbaria kirilowii)
Origin: Introduced
Hitchcock's spiraea (Spiraea ×hitchcockii)
Distribution: Currently only known from Pierce County in Washington; Washington south to Oregon.
Habitat: Forest openings at low to moderate elevations in the mountains.
Origin: Native
Pyramid spiraea (Spiraea ×pyramidata)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to south Oregon, east to Idaho and Montana.
Habitat: Somewhat dry forest openings, moderate to mid-elevations in the mountains.
Origin: Native
Shiny-leaf spiraea (Spiraea lucida)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to Oregon, east to Saskatchewan and Wyoming.
Habitat: Stream banks and open to wooded areas, sea level to high elevations in the mountains.
Origin: Native
Shinyleaf spiraea (Spiraea lucida)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to Oregon, east to Saskatchewan and Wyoming.
Habitat: Stream banks and open to wooded areas, sea level to high elevations in the mountains.
Origin: Native
Green spleenwort (Asplenium viride)
Distribution: Both sides of the Cascades crest in Washington; Alaska to California, east across northern North America to New England and the Canadian Maritimes; circumboreal.
Habitat: Cliff crevices, especially on limestone, often near or above timberline.
Origin: Native
Green spleenwort (Asplenium viride)
Distribution: Both sides of the Cascades crest in Washington; Alaska to California, east across northern North America to New England and the Canadian Maritimes; circumboreal.
Habitat: Cliff crevices, especially on limestone, often near or above timberline.
Origin: Native
Danish scurvygrass; scurvy-grass; spoonwort (Cochlearia groenlandica)
Origin: Native
Spoonwort (Cochlearia groenlandica)
Origin: Native
Old man in the spring (Senecio vulgaris)
Distribution: Introduced throughout the United States; common west of the Cascades in the Pacific Northwest
Habitat: Roadsides, waste ground
Origin: Introduced from Europe
Broadleaf springbeauty (Claytonia cordifolia)
Distribution: Occurring on both sides of the Cascades crest in Washington;
Habitat: On wet soil, usually along streams, moderate to mid-elevations in the mountains.
Origin: Native
Great Basin springbeauty (Claytonia umbellata)
Origin: Native
Heart-leaf springbeauty (Claytonia cordifolia)
Distribution: Occurring on both sides of the Cascades crest in Washington;
Habitat: On wet soil, usually along streams, moderate to mid-elevations in the mountains.
Origin: Native
Lanceleaf springbeauty (Claytonia lanceolata)
Distribution: Widely distributed on both sides of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Sagebrush foothills to alpine slopes, usually where vernally moist.
Origin: Native
Siberian springbeauty (Claytonia sibirica)
Distribution: Distributed on both sides of the Cascades in Washington; Alaska to California, east to Montana and Utah.
Habitat: Moist, usually shady places, lowlands to mid-elevations in the mountains.
Origin: Native
Streambank springbeauty (Montia parvifolia)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to Montana and Idaho.
Habitat: Somewhat moist, open, often rocky, slopes and outcroppings, sea level to moderate elevations in the mountains.
Origin: Native
Black Hills spruce (Picea glauca)
Origin: Native
Porsild spruce (Picea glauca)
Origin: Native
Sitka spruce (Picea sitchensis)
Distribution: West of the Cascades, Alaska to California
Habitat: Along the coast, from sea level up to about 2,000 feet in moist valleys
Origin: Native
Western white spruce (Picea glauca)
Origin: Native
White spruce (Picea glauca)
Origin: Native
Balkan spurge (Euphorbia oblongata)
Distribution: Occurring in a few counties in lowland western Washington; Washington to California.
Habitat: Disturbed, open areas, including roadsides and wastelots
Origin: Introduced from Europe
Broad leaved glaucous spurge (Euphorbia myrsinites)
Distribution: Chiefly east of the Cascades in Washington; Washington south to California, east to Colorado and New Mexico; reported from Ottawa and Minnesota.
Habitat: Disturbed areas often arid areas or dry soils.
Origin: Introduced from Mediterranean
Broad leaved spurge (Euphorbia platyphyllos)
Origin: Introduced from Europe
Caper spurge (Euphorbia lathyris)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia south to California and Arizona, widely distributed in eastern North America.
Habitat: Disturbed soil and wasteland.
Origin: Introduced from Eurasia
Corrugate seeded spurge (Euphorbia glyptosperma)
Distribution: Chiefly east of the Cascades in Washington; British Columbia south to California, east to Maine and Texas.
Habitat: Dry, sandy soil, from the plains to the lower mountains.
Origin: Native
Cypress spurge (Euphorbia cyparissias)
Distribution: Scattered locations on both sides of the Cascades in Washington; introduced throughout much of North America.
Habitat: Disturbed areas, often where escaped from cultivation.
Origin: Introduced from Eurasia
Egg leaf spurge (Euphorbia oblongata)
Distribution: Occurring in a few counties in lowland western Washington; Washington to California.
Habitat: Disturbed, open areas, including roadsides and wastelots
Origin: Introduced from Europe
Leafy spurge (Euphorbia virgata)
Distribution: Introduced in much of the United States, except Oklahoma to Virginia and south; mostly eastern Washington, Idaho and Montana in the Pacific Northwest
Habitat: Noxious weed of disturbed soils
Origin: Introduced
Mediterranean spurge (Euphorbia characias)
Distribution: not reported as occurring elsewhere in North America.
Habitat: Open slopes, rock faces, disturbed open areas.
Milk spurge (Euphorbia maculata)
Distribution: Occurring on both sides of the Cascades in Washington; widely distributed throughout much of North America.
Habitat: Disturbed soil and waste areas.
Origin: Introduced from eastern North America
Myrtle spurge (Euphorbia myrsinites)
Distribution: Chiefly east of the Cascades in Washington; Washington south to California, east to Colorado and New Mexico; reported from Ottawa and Minnesota.
Habitat: Disturbed areas often arid areas or dry soils.
Origin: Introduced from Mediterranean
Petty spurge (Euphorbia peplus)
Distribution: Occurring chiefly west of the Cascades in Washington; widely distributed throughout much of North America except central U.S.
Habitat: Weed of disturbed ground.
Origin: Introduced from Europe
Reticulate seeded spurge (Euphorbia spathulata)
Origin: Native
Ridge seeded spurge (Euphorbia glyptosperma)
Distribution: Chiefly east of the Cascades in Washington; British Columbia south to California, east to Maine and Texas.
Habitat: Dry, sandy soil, from the plains to the lower mountains.
Origin: Native
Spatulate leaved spurge (Euphorbia spathulata)
Origin: Native
Spotted spurge (Euphorbia maculata)
Distribution: Occurring on both sides of the Cascades in Washington; widely distributed throughout much of North America.
Habitat: Disturbed soil and waste areas.
Origin: Introduced from eastern North America
Summer spurge (Euphorbia helioscopia)
Distribution: Introduced chiefly west of the Cascades in Washington; widely distributed throughout much of North America.
Habitat: Weed of cultivated areas and abondoned gardens.
Origin: Introduced from Eurasia
Sun spurge (Euphorbia helioscopia)
Distribution: Introduced chiefly west of the Cascades in Washington; widely distributed throughout much of North America.
Habitat: Weed of cultivated areas and abondoned gardens.
Origin: Introduced from Eurasia
Thyme leaved spurge (Euphorbia serpyllifolia)
Distribution: Chiefly east of the Cascades in Washington; British Columbia south to Baja California, east to Alberta and Texas.
Habitat: Dry ground from the plains to the lower mountains.
Origin: Native
Upright spurge (Euphorbia serrulata)
Origin: Introduced from Europe
Wart spurge (Euphorbia helioscopia)
Distribution: Introduced chiefly west of the Cascades in Washington; widely distributed throughout much of North America.
Habitat: Weed of cultivated areas and abondoned gardens.
Origin: Introduced from Eurasia
Warty spurge (Euphorbia spathulata)
Origin: Native
Spurge-laurel (Daphne laureola)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south, west of the Cascades, to Oregon.
Habitat: Roadsides and open, moist woods in the lowlands.
Origin: Introduced from Eurasia
Corn spurry (Spergula arvensis)
Distribution: Introduced in much of the United States; mostly west of the Cascades in Washington and Oregon
Habitat: Weed of waste ground, usually at lower elevations
Origin: Introduced from Europe
Common three square (Schoenoplectus pungens)
Distribution: Occurring on both sides of the Cascades crest in Washington; widespread throughout North America.
Habitat: Marshes and wet, low ground; tolerent of alkali.
Origin: Native
Rounded three square (Schoenoplectus triqueter)
Origin: Introduced
Squashberry (Viburnum edule)
Distribution: Widely distributed on both sides of the Cascades in Washington; Alaska south to Newfoundland, south to northern Oregon, Colorado and Pennsylvania.
Habitat: Moist woods and swamps.
Origin: Native
Squaw-potato (Perideridia oregana)
Distribution: Western Washington to northern California, in and west of the Cascades.
Habitat: Moist to dry meadows and open slopes or flats, from the valleys to well up in the mountains.
Origin: Native
Squawcarpet (Ceanothus prostratus)
Distribution: East slope of the Cascades in Washington from , Yakima County south; Washington south to California, east to Idaho and western Nevada.
Habitat: Drier open woods, moderate to mid-elevations in the mountains.
Origin: Native
Big squirreltail (Elymus multisetus)
Origin: Native
Staggerweed (Stachys arvensis)
Distribution: West of the Cascades in Washington near Seattle and Bellingham; British Columbia south to California; Gulf Coast and northeastern U.S.
Habitat: Weed in disturbed areas.
Origin: Introduced
Clasping twisted stalk (Streptopus amplexifolius)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, also in northeastern North America.
Habitat: Open to dense moist forests from low elevations to subalpine.
Origin: Native
Rosy twisted stalk (Streptopus lanceolatus)
Distribution: Distributed throughout the Olympic and Cascade mountains in Washington; Alaska south to Oregon.
Habitat: Streambanks and damp woods at moderate to high elevations in the mountains.
Origin: Native
Rosy twisted stalk (Streptopus lanceolatus)
Distribution: Distributed throughout the Olympic and Cascade mountains in Washington; Alaska south to Oregon.
Habitat: Streambanks and damp woods at moderate to high elevations in the mountains.
Origin: Native
Broad-leaved shooting star (Dodecatheon hendersonii)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California.
Habitat: Woods and prairies, at low elevations in our area.
Origin: Native
Bulbiferous prairie star (Lithophragma glabrum)
Distribution: East of the Cascades in Washington; British Columbia to California, east to the Dakotas and Colorado.
Habitat: Grasslands and sagebrush desert to ponderosa pine and Douglas fir forests.
Origin: Native
Bushy blazing star (Mentzelia dispersa)
Distribution: East of the Cascades in Washington; Washington south to southern California, east to Montana and Colorado.
Habitat: Dry soil, from the plains into the canyons and slopes of the lower mountains.
Origin: Native
Gold star (Crocidium multicaule)
Distribution: Occurring on both sides the Cascades crest in Washington; British Columbia south to California, east to Idaho.
Habitat: Dry, open areas at low elevations, especially shrub-steppe.
Origin: Native
Henderson's shooting star (Dodecatheon hendersonii)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California.
Habitat: Woods and prairies, at low elevations in our area.
Origin: Native
Jeffrey's shooting star (Dodecatheon jeffreyi)
Distribution: Alaska to California, east to Montana and Wyoming; in the Olympic and Cascade Mountains in Washington
Habitat: Wet meadows and stream banks, mid- to high elevations in the mountains
Origin: Native
Narcissus shooting star (Dodecatheon poeticum)
Distribution: From around Satus Creek, Yakima County, Washington, to Klickitat and Skamania Counties, south to Wasco and Hood River Counties, Oregon.
Habitat: Grassy slopes to drier woods, usually where vernally moist, often near seeps or springs along basaltic outcrops.
Origin: Native
Small-flowered prairie star (Lithophragma parviflorum)
Distribution: Widely distributed throughout Washington; British Columbia south to California, east to the Rocky Mountains and Great Plains.
Habitat: Prairies, sagebrush desert and forest openings, sea level to mid-elevations in the mountains.
Origin: Native
Tall mountain shooting star (Dodecatheon jeffreyi)
Distribution: Alaska to California, east to Montana and Wyoming; in the Olympic and Cascade Mountains in Washington
Habitat: Wet meadows and stream banks, mid- to high elevations in the mountains
Origin: Native
White shooting star (Dodecatheon dentatum)
Distribution: Olympic Mountains and east of the Cascades, British Columbia to northern Oregon; also in central Idaho
Habitat: Streambanks and other wet places at moderate elevations in the mountains
Origin: Native
Hairy star-of-bethleham (Gagea villosa)
Origin: Introduced
Arctic starflower (Trientalis europaea)
Distribution: Both side of the Cascades in Washington; Alaska south to California, east to Alberta and Idaho.
Habitat: Bogs and swamps, low to mid-elevations in the mountains.
Origin: Native
Broad-leaved starflower (Trientalis latifolia)
Distribution: Occurring on both sides of the Cascades crest in Washington; Yukon Territory south to California, east to Idaho.
Habitat: Woods and prairies, low to moderate elevations in the mountains.
Origin: Native
Northern starflower (Trientalis europaea)
Distribution: Both side of the Cascades in Washington; Alaska south to California, east to Alberta and Idaho.
Habitat: Bogs and swamps, low to mid-elevations in the mountains.
Origin: Native
Western starflower (Trientalis latifolia)
Distribution: Occurring on both sides of the Cascades crest in Washington; Yukon Territory south to California, east to Idaho.
Habitat: Woods and prairies, low to moderate elevations in the mountains.
Origin: Native
Western starflower (Trientalis latifolia)
Distribution: Occurring on both sides of the Cascades crest in Washington; Yukon Territory south to California, east to Idaho.
Habitat: Woods and prairies, low to moderate elevations in the mountains.
Origin: Native
Water stargrass (Heteranthera dubia)
Distribution: In scattered localities in Washington, however locally common and abundant in lower Yakima River; British Columbia south to California, widespread in eastern North America.
Habitat: Quiet streams, ponds and lakes.
Origin: Native
Iberian starthistle (Centaurea iberica)
Origin: Introduced
Maltese starthistle (Centaurea melitensis)
Distribution: Occurring chiefly west of the Cascades in Washington; British Columbia south to California and Mexicos, east to Texas and eastern North America.
Habitat: Roadsides and waste places.
Origin: Introduced from the Mediterranean region
Montane starthistle (Centaurea montana)
Distribution: In scattered locations throughout Washington, but more common west of the Cascades; British Columbia to Oregon, east to Montana and Utah; in upper midwestern and northeastern U.S. and Canada.
Habitat: Occasionally escapes from cultivation; open, disturbed areas in shrub-steppe, forests, and along roadsides.
Origin: Introduced from Europe
Purple starthistle (Centaurea calcitrapa)
Origin: Introduced
Red starthistle (Centaurea calcitrapa)
Origin: Introduced
Yellow starthistle (Centaurea solstitialis)
Distribution: Introduced in most of the United States; chiefly east of the Cascades in Washington and Oregon
Habitat: Noxious weed of dry, disturbed areas
Origin: Introduced
Blunt-sepaled starwort (Stellaria obtusa)
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia south to California, east to the Canadian and Southern Rocky Mountains.
Habitat: Moist forest and riparian zone understory, talus slopes, from low to moderate elevations.
Origin: Native
Crisped starwort (Stellaria crispa)
Distribution: Alaska to California, east to Alberta and Wyoming.
Habitat: Moist areas in the lowlands and lower mountains.
Origin: Native
Grass-leaf starwort (Stellaria graminea)
Distribution: Introduced and abundant in eastern United States; occasional in western Washington and Idaho.
Habitat: Chiefly in lawns.
Origin: Introduced from Eurasia
Long-leaved starwort (Stellaria longifolia)
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout North America except in the south-central and southeastern U.S.
Habitat: Wet meadows, swamps, marshes, forested wetlands at low to moderate elevations.
Origin: Native
Northern bog starwort (Stellaria calycantha)
Distribution: Circumpolar, south in North America to California, Michegan and New York.
Habitat: Moist meadows and steam banks, low to high elevations.
Origin: Native
Saltmarsh starwort (Stellaria humifusa)
Distribution: Occurring along the coast in Washington; Alaska south to Oregon, east across Canada to the Atlantic coast; circumpolar.
Habitat: Salt marshes.
Origin: Native
Shiny starwort (Stellaria nitens)
Distribution: British Columbia to Baja California, east to Idaho and Utah.
Habitat: Gravelly prairies and stream banks to grassy hillsides at low elevations.
Origin: Native
Umbrella starwort (Stellaria umbellata)
Distribution: Occurring chiefly east of the Cascades crest in central and south-central Washington; Alaska south to California, east to Northwest Territories, south throughout western U.S.
Habitat: Wetlands, riparian zones, stream banks.
Origin: Native
Long-horn steer's-head (Dicentra uniflora)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to Montana and Colorado.
Habitat: Well-drained soil, foothills to subalpine slopes; blooms soon after the snow leaves.
Origin: Native
Narrowleaf stephanomeria (Stephanomeria tenuifolia)
Distribution: East of the Cascades in Washington; southern British Columbia south to California, east to Texas and western Montana.
Habitat: Dry, often rocky places, from the foothills and plains to moderate elevations in the mountains.
Origin: Native
Stiff branched stephanomeria (Stephanomeria paniculata)
Distribution: Occurring east of the Cascades in Washington; Oregon and adjacent Idaho, south to California.
Habitat: Dry, open places in the plains and foothills.
Origin: Native
Bog stichwort (Stellaria alsine)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to Washington in western North America; native to eastern North America; also introduced in Chile.
Habitat: Streambanks, culverts, ditches, and moist forest edges, typically where disturbed.
Origin: Introduced from Europe
Blue stickseed (Hackelia micrantha)
Distribution: Common, Cascade Mountains in Washington and Oregon, Rocky Mountains in Idaho
Habitat: Hillsides and open areas at mid-elevations
Origin: Native
Bristly stickseed (Lappula squarrosa)
Distribution: Occurring east of the Cascades crest in Washington; widely distributed throughout much of North America; Eurasia.
Habitat: Shrub-steppe, disturbed areas, roadside.
Origin: Introduced; from Eurasia, possibly native in northern Rocky Mts. (Cronquist et al. 1984)
Common stickseed (Lappula squarrosa)
Distribution: Occurring east of the Cascades crest in Washington; widely distributed throughout much of North America; Eurasia.
Habitat: Shrub-steppe, disturbed areas, roadside.
Origin: Introduced; from Eurasia, possibly native in northern Rocky Mts. (Cronquist et al. 1984)
European stickseed (Lappula squarrosa)
Distribution: Occurring east of the Cascades crest in Washington; widely distributed throughout much of North America; Eurasia.
Habitat: Shrub-steppe, disturbed areas, roadside.
Origin: Introduced; from Eurasia, possibly native in northern Rocky Mts. (Cronquist et al. 1984)
Gray stickseed (Hackelia cinerea)
Distribution: Occurring in Kittitas, Chelan and Spokane counties in Washington; Washington east to northern Idaho and northwest Montana.
Habitat: Open or lightly forested areas, especially on talus or cliffs, and loose stream banks, in valleys and foothills to moderate elevations in the mountains.
Origin: Native
Lesser showy stickseed (Hackelia venusta)
Distribution: Endemic to Chelan County, WA.
Habitat: Rocky slopes with ponderosa pine, at about 1000 feet elevation.
Origin: Native, endemic to WA
Manyflowered stickseed (Hackelia floribunda)
Distribution: Occurring east of the Cascades crest in Washington; Southern British Columbia south to California, east to the Rocky Mountains.
Habitat: Thickets, meadows, stream banks and other moist places, from low elevations to mid-elevations in the mountains.
Origin: Native
Okanogan stickseed (Hackelia ciliata)
Distribution: Spokane and Stevens Counties to Okanogan and Kittitas Counties, Washington
Habitat: Dry, open slopes and flats in areas with sagebrush or ponderosa pine.
Origin: Native
Showy stickseed (Hackelia venusta)
Distribution: Endemic to Chelan County, WA.
Habitat: Rocky slopes with ponderosa pine, at about 1000 feet elevation.
Origin: Native, endemic to WA
Taylor's stickseed (Hackelia taylorii)
Origin: Native
Sticktight (Bidens frondosa)
Distribution: Widely distributed throughout much of Washington; widely distributed throughout North America except Alaska and northernmost Canada.
Habitat: Wet areas at low elevations.
Origin: Native
Western sticktight (Bidens vulgata)
Distribution: Distributed widely throughout Washington; British Columbia east to Nova Scotia, and southward throughout much of the U.S.
Habitat: Streamsides, ponds, lakes, ditches and other moist to wet waste places.
Origin: Native
Sticky-starwort (Pseudostellaria jamesiana)
Distribution: East of the Cascades crest in Washington; Washington south to California, east to Idaho, Wyoming and New Mexico.
Habitat: Moist or dry open woods, rocky slopes and meadows, from moderate to high elevations.
Origin: Native
Sticky-willy (Galium aparine)
Distribution: Widely distributed throughout Washington; widely distributed throughout North America.
Habitat: Variety of habitats, sea level to mid-elevations in the mountains.
Origin: Native
Stinkgrass (Eragrostis cilianensis)
Distribution: Central Washington south ot California, east to Maine.
Habitat: Disturbed areas and waste land, and along streams and pond margins.
Origin: Introduced from Europe
Stinkweed (Peritoma serrulata)
Distribution: East of the Cascades in Washington; widely distributed throughout North America except Alaska and southeastern U.S.
Habitat: Sagebrush deserts and Ponderosa pine forest openings.
Origin: Native
Boreal stitchwort (Minuartia rubella)
Distribution: Alaska to Greenland, south in the mountains to Oregon and New Mexico
Habitat: Subalpine to alpine meadows, ridges and talus slopes
Origin: Native
Dwarf stitchwort (Minuartia pusilla)
Origin: Native
Elegant stitchwort (Minuartia elegans)
Origin: Native
Slender stitchwort (Minuartia tenella)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to Oregon.
Habitat: Lowlands, prairies and coastal bluffs.
Origin: Native
Ditch stonecrop (Penthorum sedoides)
Origin: Introduced
Forster's stonecrop (Sedum forsterianum)
Origin: Introduced
Jenny's stonecrop (Sedum thartii)
Origin: Introduced
Jenny's stonecrop (Sedum thartii)
Origin: Introduced
Lance-leaved stonecrop (Sedum lanceolatum)
Distribution: Widely distributed across Washington; Alaska south to California, east to the Rocky Mountains and northern Great Plains in the U.S. and Canada.
Habitat: Usually on rocks or gravel in open, dry areas, from sea level to high elevations in the mountains.
Origin: Native
Lance-leaved stonecrop (Sedum lanceolatum)
Distribution: Widely distributed across Washington; Alaska south to California, east to the Rocky Mountains and northern Great Plains in the U.S. and Canada.
Habitat: Usually on rocks or gravel in open, dry areas, from sea level to high elevations in the mountains.
Origin: Native
Lance-leaved stonecrop (Sedum lanceolatum)
Distribution: Widely distributed across Washington; Alaska south to California, east to the Rocky Mountains and northern Great Plains in the U.S. and Canada.
Habitat: Usually on rocks or gravel in open, dry areas, from sea level to high elevations in the mountains.
Origin: Native
Lance-leaved stonecrop (Sedum rupicola)
Distribution: In the Cascades and Olympic Mountains of Washington; Washington east to Idaho.
Habitat: Open, exposed places, usually on rocks or in gravelly soil, at moderate elevations in the mountains.
Origin: Native
Leiberg's stonecrop (Sedum leibergii)
Distribution: Yakima County, Washington, south to northcentral Oregon and east to southeast Washington and western Idaho; along the Snake River.
Habitat: Mossy rocks to open, gravelly hillsides, chiefly in canyons.
Origin: Native
Mossy stonecrop (Crassula tillaea)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California.
Habitat: Disturbed areas, rock crevices, and sandy areas, often where seasonally wet or moist.
Origin: Introduced from Europe
Mossy stonecrop (Sedum acre)
Distribution: Occurring chiefly west of the Cascades in Washington; British Columbia south to Oregon, east across Canada, and the central, southeastern, and northeastern U.S. to the Atlantic Coast.
Habitat: Disturbed ground.
Origin: Introduced from Europe
Pacific stonecrop (Sedum divergens)
Distribution: Alaska to California, Olympic mountains and the Cascades
Habitat: Open, rocky areas, mid- to high elevations in the mountains
Origin: Native
Short-leaved stonecrop (Sedum brevifolium)
Origin: Introduced from southern Europe
Spreading stonecrop (Sedum divergens)
Distribution: Alaska to California, Olympic mountains and the Cascades
Habitat: Open, rocky areas, mid- to high elevations in the mountains
Origin: Native
Stonecrop (Sedum rupicola)
Distribution: In the Cascades and Olympic Mountains of Washington; Washington east to Idaho.
Habitat: Open, exposed places, usually on rocks or in gravelly soil, at moderate elevations in the mountains.
Origin: Native
White stonecrop (Sedum album)
Distribution: Occurring in scattered locations across Washington; British Columbia south to California, Utah, and in northeastern North America.
Habitat: Disturbed, open areas including fields, lawns, parking areas, and rocky outcroppings.
Origin: Introduced
Western stoneseed (Lithospermum ruderale)
Distribution: Common east of the Cascades in southern British Columbia, Washington and Oregon
Habitat: Shrub-steppe to open, dry areas in the mountains at mid-elevations
Origin: Native
Stranvaesia (Photinia davidiana)
Origin: Introduced from China
Beach strawberry (Fragaria chiloensis)
Distribution: Along the coast from Alaska to California, and the shores of some Puget Sound islands
Habitat: Strictly maritime
Origin: Native
Beach strawberry (Fragaria chiloensis)
Distribution: Along the coast from Alaska to California, and the shores of some Puget Sound islands
Habitat: Strictly maritime
Origin: Native
Coastal strawberry (Fragaria chiloensis)
Distribution: Along the coast from Alaska to California, and the shores of some Puget Sound islands
Habitat: Strictly maritime
Origin: Native
Coastal strawberry (Fragaria chiloensis)
Distribution: Along the coast from Alaska to California, and the shores of some Puget Sound islands
Habitat: Strictly maritime
Origin: Native
Cultivated strawberry (Fragaria chiloensis)
Distribution: Along the coast from Alaska to California, and the shores of some Puget Sound islands
Habitat: Strictly maritime
Origin: Native
Strawberry-tomato (Physalis grisea)
Origin: Introduced from E. NA
Streptanthella (Streptanthella longirostris)
Distribution: Occurring in south-central Washington; Washington south to California, east to Wyoming and New Mexico.
Habitat: Open desert and sagebrush slopes.
Origin: Native
Gum succory (Chondrilla juncea)
Distribution: Occurring chiefly east of the Cascades in Washington; British Columbia south to California and east to Montana; also occurring in eastern North America.
Habitat: Dry, light soil, rangeland and roadsides.
Origin: Introduced from Eurasia
Wild succory (Cichorium intybus)
Distribution: Widely distributed throughout most of Washington; widely distributed throughout most of North America.
Habitat: Dry to moist soil, pastures, roadsides, and other disturbed areas.
Origin: Introduced from Europe
Sugarstick (Allotropa virgata)
Distribution: Both sides of the Cascades in Washington; British Columbia south to California.
Habitat: Deep humus of coniferous forests at low to moderate elevations.
Origin: Native
Smooth sumac (Rhus glabra)
Distribution: East of the Cascades in Washington; British Columbia to Mexico, east to New Hampshire and Georgia.
Habitat: Dry hillsides and draws, low to moderate elevations.
Origin: Native
Staghorn sumac (Rhus typhina)
Origin: Introduced
Blackfoot river suncup (Neoholmgrenia andina)
Distribution: East of the Cascades in Washington; British Columbia south to California, east to Montana and Utah.
Habitat: Dry hillsides and sagebrush scablands to the ponderosa pine forests of the foothills.
Origin: Native
Blackfoot river suncup (Neoholmgrenia andina)
Distribution: East of the Cascades in Washington; British Columbia south to California, east to Montana and Utah.
Habitat: Dry hillsides and sagebrush scablands to the ponderosa pine forests of the foothills.
Origin: Native
Blackfoot river suncup (Neoholmgrenia andina)
Distribution: East of the Cascades in Washington; British Columbia south to California, east to Montana and Utah.
Habitat: Dry hillsides and sagebrush scablands to the ponderosa pine forests of the foothills.
Origin: Native
Contorted pod suncup (Camissonia contorta)
Distribution: Along the coast and along the Columbia and Snake Rivers in Washington; British Columbia south to Baja California, east to the Rocky Mountains.
Habitat: Sandy soil along the coast and along inland rivers.
Origin: Native
Dwarf suncup (Eremothera pygmaea)
Distribution: East of the Cascades in Washington in central part of the state; Washington south to Oregon, east to Idaho.
Habitat: Vernally moist areas in open, sagebrush desert
Origin: Native
Dwarf suncup (Eremothera pygmaea)
Distribution: East of the Cascades in Washington in central part of the state; Washington south to Oregon, east to Idaho.
Habitat: Vernally moist areas in open, sagebrush desert
Origin: Native
Green river suncup (Eremothera minor)
Distribution: East of the Cascades in Washington; Washington south to California, east to Montana and Colorado.
Habitat: Sagebrush desert, often where vernally moist
Origin: Native
Green river suncup (Eremothera minor)
Distribution: East of the Cascades in Washington; Washington south to California, east to Montana and Colorado.
Habitat: Sagebrush desert, often where vernally moist
Origin: Native
Hilgard's suncup (Neoholmgrenia hilgardii)
Distribution: East of the Cascades crest in Washington; Washington south to Klickitat County, Washington, and in Multanomah County, Oregon.
Habitat: Sagebrush deserts.
Origin: Native
Hilgard's suncup (Neoholmgrenia hilgardii)
Distribution: East of the Cascades crest in Washington; Washington south to Klickitat County, Washington, and in Multanomah County, Oregon.
Habitat: Sagebrush deserts.
Origin: Native
Lewis river suncup (Camissonia parvula)
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia south to California, east to Idaho and Nevada.
Habitat: Open to disturbed grasslands, sandy areas, sagebrush, and scrub forest.
Origin: Native
Obscure suncup (Neoholmgrenia andina)
Distribution: East of the Cascades in Washington; British Columbia south to California, east to Montana and Utah.
Habitat: Dry hillsides and sagebrush scablands to the ponderosa pine forests of the foothills.
Origin: Native
Obscure suncup (Neoholmgrenia andina)
Distribution: East of the Cascades in Washington; British Columbia south to California, east to Montana and Utah.
Habitat: Dry hillsides and sagebrush scablands to the ponderosa pine forests of the foothills.
Origin: Native
Obscure suncup (Neoholmgrenia andina)
Distribution: East of the Cascades in Washington; British Columbia south to California, east to Montana and Utah.
Habitat: Dry hillsides and sagebrush scablands to the ponderosa pine forests of the foothills.
Origin: Native
Twisted suncup (Camissonia contorta)
Distribution: Along the coast and along the Columbia and Snake Rivers in Washington; British Columbia south to Baja California, east to the Rocky Mountains.
Habitat: Sandy soil along the coast and along inland rivers.
Origin: Native
English sundew (Drosera anglica)
Distribution: In scattered localities on both sides of the Cascades; Alaska south to the Sierra Nevada of California, east to the Great Lakes region and eastern Canada.
Habitat: Bogs and swamps.
Origin: Native
Giant sundew (Drosera anglica)
Distribution: In scattered localities on both sides of the Cascades; Alaska south to the Sierra Nevada of California, east to the Great Lakes region and eastern Canada.
Habitat: Bogs and swamps.
Origin: Native
Round-leaf sundew (Drosera rotundifolia)
Distribution: Chiefly west of the Cascades in Washington, but also in scattered localities east of the Cascades crest; Alaska to California, east across Montana and North Dakota, and most of the United states east of the Mississipps River.
Habitat: Swamps and bogs, lowlands to mid-elevations in the mountains.
Origin: Native
Common sunflower (Helianthus annuus)
Distribution: Occurring chiefly east of the Cascades in Washington, but also on west side where escaped from cultivation.
Habitat: Open, dry to moderately moist soil; foothills, valleys and waste land.
Origin: Native and introduced populations in Washington.
Cusick's sunflower (Helianthus cusickii)
Distribution: In Washington, from Chelan County south between the Cascades and the Columbia River, eastern Oregon and adjacent Idaho, and northeastern California.
Habitat: Dry, open plains and foothills.
Origin: Native
Narrow leaved sunflower (Helianthus maximiliani)
Distribution: Introduced from east of the Rockies to British Columbia, Idaho, and eastern Washington.
Habitat: Dry, open places, often on waste ground.
Origin: Possibly introduced from further east
Prairie sunflower (Helianthus petiolaris)
Origin: Introduced from further east
Sawtooth sunflower (Helianthus grosseserratus)
Origin: Introduced from eastern N. Am. along railroads at Bingen and near Spokane
Smooth dwarf sunflower (Wyethia amplexicaulis)
Distribution: Occurring east of the Cascades in Washington; Washington south to Nevada, east to the Rocky Mountains.
Habitat: Slightly moist spots in the shrub-steppe, to open areas at mid-elevation.
Origin: Native
Turniproot sunflower (Helianthus cusickii)
Distribution: In Washington, from Chelan County south between the Cascades and the Columbia River, eastern Oregon and adjacent Idaho, and northeastern California.
Habitat: Dry, open plains and foothills.
Origin: Native
Scouler's surf-grass (Phyllospadix scouleri)
Distribution: Occurring along the coast of Washington where rocky; Alaska south to California.
Habitat: Intertidal and sub-tidal levels.
Origin: Native
Toothed surf-grass (Phyllospadix serrulatus)
Origin: Native
Torrey's surf-grass (Phyllospadix torreyi)
Origin: Native
Swamp (Equisetum fluviatile)
Distribution: Alaska to Oregon, east across southern Canada and the northern tier of states in the United States.
Habitat: Shallow water, marshes and bogs, along muddy shores, from the lowlands to moderate elevations in the mountains.
Origin: Native
Swampcandles (Lysimachia terrestris)
Distribution: Along the coast in Washington; British Columbia south to Oregon and Idaho; native and abundant in central and eastern North America.
Habitat: Cultivated cranberry bogs, and swamps.
Origin: Introduced from E. NA
Sweet-after-death (Achlys triphylla)
Distribution: Both sides of the Cascades in Washington; British Columbia south to California.
Habitat: Moist areas in deep woods to forest openings.
Origin: Native
Blunt-fruit sweet-cicely (Osmorhiza depauperata)
Origin: Native
Chilean sweet-cicely (Osmorhiza berteroi)
Distribution: Widely distributed throughout much of Washington; southern Alaska to California, east to South Dakota and Arizona.
Habitat: Woodlands, from near sea level to moderate elevations in the mountains.
Origin: Native
Chilean sweet-cicely (Osmorhiza berteroi)
Distribution: Widely distributed throughout much of Washington; southern Alaska to California, east to South Dakota and Arizona.
Habitat: Woodlands, from near sea level to moderate elevations in the mountains.
Origin: Native
Mountain sweet-cicely (Osmorhiza berteroi)
Distribution: Widely distributed throughout much of Washington; southern Alaska to California, east to South Dakota and Arizona.
Habitat: Woodlands, from near sea level to moderate elevations in the mountains.
Origin: Native
Mountain sweet-cicely (Osmorhiza berteroi)
Distribution: Widely distributed throughout much of Washington; southern Alaska to California, east to South Dakota and Arizona.
Habitat: Woodlands, from near sea level to moderate elevations in the mountains.
Origin: Native
Purple sweet-cicely (Osmorhiza purpurea)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to Alberta, Idaho, and Montana.
Habitat: Moist areas at mid-elevations in the mountains.
Origin: Native
Sierran sweet-cicely (Osmorhiza occidentalis)
Distribution: Occurring chiefly east of the Cascades in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Low to mid-elevations in open areas and openings in wooded areas.
Origin: Native
Western sweet-cicely (Osmorhiza occidentalis)
Distribution: Occurring chiefly east of the Cascades in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Low to mid-elevations in open areas and openings in wooded areas.
Origin: Native
Indian sweet-clover (Melilotus indicus)
Distribution: Sparingly introduced in western Washington and Oregon, more common in California.
Habitat: Waste ground, disturbed soil.
Origin: Introduced
Yellow sweet-clover (Melilotus officinalis)
Distribution: Widely distributed throughout Washington; introduced throughout the United States
Habitat: Widespread weed of roadsides and waste ground.
Origin: Introduced
Western sweet-vetch (Hedysarum occidentale)
Distribution: Occurring in the Olympic Mountains in Washington; British Columbia south to Washington, Idaho and Utah, east to Alberta, Montana, Wyoming, and Colorado.
Habitat: Alpine and subalpine areas.
Origin: Native
Western sweet-vetch (Hedysarum occidentale)
Distribution: Occurring in the Olympic Mountains in Washington; British Columbia south to Washington, Idaho and Utah, east to Alberta, Montana, Wyoming, and Colorado.
Habitat: Alpine and subalpine areas.
Origin: Native
Yellow sweet-vetch (Hedysarum sulphurescens)
Distribution: East slope of the Cascades in Washington; British Columbia to Washington, east to Alberta and Montana.
Habitat: Open forested areas.
Origin: Native
Small-flowered sweetbrier (Rosa micrantha)
Origin: Introduced from Asia
American sweetflag (Acorus americanus)
Distribution: Very limited distribution in Washington along eastern border with Idaho; widely distributed throughout northern half of North America from Alaska to Newfoundland.
Habitat: Wetlands, lake margins, and riparian zones.
Origin: Native
Several-vein sweetflag (Acorus americanus)
Distribution: Very limited distribution in Washington along eastern border with Idaho; widely distributed throughout northern half of North America from Alaska to Newfoundland.
Habitat: Wetlands, lake margins, and riparian zones.
Origin: Native
Sweetgale (Myrica gale)
Distribution: West of the Cascades in Washington; Alaska south to Oregon, east across northern Canada, upper Midwest, and northeastern U.S.
Habitat: Coastal bogs, swamps, lakes and streams.
Origin: Native
California sweetgrass (Anthoxanthum occidentale)
Origin: Native
Hairy sweetgrass (Anthoxanthum hirtum)
Distribution: Occurring in scattered locations across Washington; Alaska south to Washington, east across the northern half of North America to the Atlantic Coast.
Habitat: Wet meadows and marshes.
Origin: Native
Alpine bog swertia (Swertia perennis)
Distribution: Narrowly distributed in Cascades of Washington; Alaska south to California, east through the Rocky Mountains.
Habitat: Streambanks, wet meadows and other moist places, mid- to high elevations in the mountains.
Origin: Native
Swertia (Swertia perennis)
Distribution: Narrowly distributed in Cascades of Washington; Alaska south to California, east through the Rocky Mountains.
Habitat: Streambanks, wet meadows and other moist places, mid- to high elevations in the mountains.
Origin: Native
Sycamore (Platanus occidentalis)
Distribution: Occurring along the shores of the Columbia River in central Washington; common and native east of the Rocky Mountains, often introduced in western United States.
Habitat: Near streams and lakes, in moist ravines.
Origin: Introduced