Vascular Plants

Includes all flowering plants, conifers, ferns and fern-allies.

Browse by common name:
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Common names beginning with L:
Rusty Labrador-tea (Rhododendron groenlandicum)
Distribution: Occurring west of the Cascades crest in Washington; Alaska south to Oregon and Idaho, east across Canada and the northern U.S. to the Atlantic Coast.
Habitat: Swamps and bogs along the coast.
Origin: Native
Flowers: June-August
Fee's lace-fern (Myriopteris gracilis)
Origin: Native
Lacepod (Thysanocarpus curvipes)
Distribution: Chiefly east of the Cascades in Washington; British Columbia south to California, east to Idaho.
Habitat: Uncommon on dry, open hillsides and borders of woodlands.
Origin: Native
Flowers: April-June
Diluvial ladies'-tresses (Spiranthes diluvialis)
Distribution: East of the Cascades in Washington; scattered localities in Colorado, Utah, Wyoming, Idaho and Montana.
Habitat: Moist to wet meadows, marshes, and riparian areas.
Origin: Native
Flowers: July-September
Hooded ladies'-tresses (Spiranthes romanzoffiana)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains and across the northern U.S. and Canada to the Atlantic Coast.
Habitat: Seasonally moist to swampy areas, sometimes in disturbed areas.
Origin: Native
Flowers: July-September
Western ladies'-tresses (Spiranthes porrifolia)
Distribution: Washington south to California, east to Idaho.
Habitat: Moist to swampy areas.
Origin: Native
Flowers: July-August
Languid lady (Mertensia oblongifolia)
Distribution: Uncommon east of the Cascades in Washington to California, east to South Dakota
Habitat: Deeper soils in shrub-steppe
Origin: Native
Flowers: June - August
Western lady's-mantle (Aphanes arvensis)
Distribution: Southern British Columbia south east of the Cascades to California; common in eastern United States.
Habitat: Weed of open fields and wooded slopes.
Origin: Introduced
Flowers: April - May
Clustered lady's-slipper (Cypripedium fasciculatum)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to Santa Cruz County, California, east to Idaho and Colorado.
Habitat: Moist to rather dry and rocky, open coniferous forests.
Origin: Native
Flowers: April-July
Columbia lady's-slipper (Cypripedium ×columbianum)
Origin: Native
Hybrid lady's-slipper (Cypripedium ×columbianum)
Origin: Native
Mountain lady's-slipper (Cypripedium montanum)
Distribution: Chiefly east of the Cascades crest in Washington; Alaska south to California, east to Montana and Wyoming.
Habitat: Dry to moist open woods, low to mid-elevations in the mountains.
Origin: Native
Flowers: May-July
Lady's-thumb (Persicaria maculosa)
Distribution: Occurring throughout much of Washington; widely distributed throughout North America.
Habitat: A weedy species, usually on moist, cultivated or otherwise disturbed soil.
Origin: Introduced
Flowers: March-September
Spotted lady's-thumb (Persicaria maculosa)
Distribution: Occurring throughout much of Washington; widely distributed throughout North America.
Habitat: A weedy species, usually on moist, cultivated or otherwise disturbed soil.
Origin: Introduced
Flowers: March-September
Alpine lady-fern (Athyrium distentifolium)
Distribution: Occurring on both sides of the Cascades crest in Washington.
Habitat: Open, rocky slopes and along streams at mid- to high elevations in the mountains.
Origin: Native
Lady-fern (Athyrium filix-femina)
Distribution: Circumboreal; throughout the Pacific Northwest
Habitat: Common in moist woods and meadows, low to mid-elevations
Origin: Native
Lamb's-lettuce (Valerianella locusta)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains; eastern half of North America east of the Great Plains.
Habitat: Moist, open places, often in disturbed soil.
Origin: Introduced from Europe
Flowers: April-May
Lambsquarters (Chenopodium album)
Distribution: Widely distributed throughout Washington; widely distributed throughout much of temperate North America.
Habitat: Widespread weed of disturbed areas, including gardens, roadsides, and waste lots.
Origin: Introduced from Europe, but some populations in the mid-west may be native to North America, according to FNA
Flowers: June-September
Landcress (Barbarea verna)
Origin: Introduced from Eurasia
Flowers: April - July
Subalpine larch (Larix lyallii)
Distribution: Occurring chiefly east of the Cascades crest in Washington; southern British Columbia to the central Cascades and Wenatchee Mountains in Washington, east to Montana and Alberta.
Habitat: Generally near timberline, preferring north-facing slopes.
Origin: Native
Cones: June-July (cone production)
Western larch (Larix occidentalis)
Distribution: East of the Cascades, British Columbia to Oregon, east to Montana and Alberta
Habitat: Mountain valleys and lower slopes, often in swampy areas
Origin: Native
Cones: May - June
Basaltic larkspur (Delphinium basalticum)
Origin: Native
Hedgenettle larkspur (Delphinium stachydeum)
Origin: Native
Flowers: Late June - Early August
Kittitas larkspur (Delphinium multiplex)
Distribution: Wenatchee Mountains of Kittitas and Chelan Counties, Washington, south to northern Yakima County.
Habitat: Along rocky, usually intermitant streams or springs in sagebrush hills to moderate elevations in the mountains.
Origin: Native
Flowers: Late May - Early August
Menzies larkspur (Delphinium menziesii)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to Oregon.
Habitat: Coastal bluffs and prairies to moist meadows and forest openings at moderate elevations in the mountains.
Origin: Native
Flowers: April-July
Nuttall's larkspur (Delphinium nuttallii)
Distribution: Pierce and eastern Grays Harbor Counties, Washington, south to the Columbia River Gorge and Clackamus County, Oregon.
Habitat: Gravelly outwash prairies and basaltic cliffs.
Origin: Native
Flowers: May - June
Olympic larkspur (Delphinium glareosum)
Distribution: In the Olympic and Cascades mountains of Washington; British Columbia south to Oregon.
Habitat: Alpine and subalpine ridges and talus slopes, sometimes found at lower elevations.
Origin: Native
Flowers: May-August
Pale larkspur (Delphinium glaucum)
Distribution: Widely distributed in mountainous areas throughout Washington; Alaska south to California, east to the Rocky Mountains of Canada and U.S.
Habitat: Wet places at moderate to mid-elevations in the mountains.
Origin: Native
Flowers: July-September
Pale larkspur (Delphinium leucophaeum)
Distribution: Known only from Lewis County in Washington; Lewis County, Washington south to Willamette Valley, Oregon.
Habitat: Bluffs, open ground, and moist lowland meadows where undisturbed.
Origin: Native
Flowers: May-June
Poison larkspur (Delphinium trolliifolium)
Distribution: Occurring west of the Cascades crest and in the Columbia River Gorge in Washington; Washington south to California.
Habitat: Moist, shady woods at low to moderate elevations.
Origin: Native
Flowers: April-May
Slim larkspur (Delphinium depauperatum)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Montana, Idaho, and Nevada.
Habitat: Moist meadows and forest openings.
Origin: Native
Flowers: May-July
Spiked larkspur (Delphinium stachydeum)
Origin: Native
Flowers: Late June - Early August
Sutherland's larkspur (Delphinium sutherlandii)
Origin: Native
Thin-petal larkspur (Delphinium lineapetalum)
Distribution: Endemic to Washington, primarily found in the Wenatchee Mountains of Chelan and Kittitas Counties in Washington.
Habitat: Meadows and forest openings in foothills and valleys.
Origin: Native
Flowers: April-June
Two-lobe larkspur (Delphinium nuttallianum)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Dry, gravelly ground, sagebrush deserts to the ponderosa pine region in the mountains.
Origin: Native
Flowers: March-July
Two-spike larkspur (Delphinium distichum)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to Oregon, east to Montana and Wyoming.
Habitat: Vernally wet swales and meadows, in sagebrush or ponderosa pine forest.
Origin: Native
Flowers: May-July
Upland larkspur (Delphinium nuttallianum)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Dry, gravelly ground, sagebrush deserts to the ponderosa pine region in the mountains.
Origin: Native
Flowers: March-July
Wenatchee larkspur (Delphinium viridescens)
Distribution: Local in the Wenatchee Mountains, Chelan and Kittitas Counties, Washington.
Habitat: Boggy meadowlands.
Origin: Native
Flowers: June - July
Western larkspur (Delphinium occidentale)
Origin: Native
Yellow-white larkspur (Delphinium xantholeucum)
Distribution: Southern Okanogan County to southern Chelan County, east into Douglas County, Washington
Habitat: Dry, grassy hillsides and ponderosa pine forests
Origin: Native
Flowers: April - June
Smooth lasthenia (Lasthenia glaberrima)
Distribution: West of the Cascades, southwest Washington south to central California.
Habitat: Wet or muddy ground at low elevations, including venral pools.
Origin: Native
Flowers: May-July
Portugal laurel (Prunus lusitanica)
Origin: Introduced
Western bog laurel (Kalmia microphylla)
Distribution: Both sides of the Cascades in Washington; Alaska south to California; east in British Columbia to the Rockies, south to Colorado.
Habitat: In moist and wetland areas from the coast to higher elevations in the mountains.
Origin: Native
Flowers: June-September
Laurustinus (Viburnum tinus)
Origin: Introduced
White layia (Layia glandulosa)
Distribution: Occurring chiefly east of the Cascades crest in Washington; southern British Columbia south to California, east to Idaho, Utah, Arizona and New Mexico.
Habitat: Dry, open places in the deserts and foothills.
Origin: Native
Flowers: April-June
Leafy leapordbane (Arnica chamissonis)
Distribution: Occurring in the Cascades and northeastern corner of Washington; Alaska south to California, east across Canada and to the Rockies in the U.S.
Habitat: Meadows and wet places at moderate elevations.
Origin: Native
Flowers: June-September
Least (Lewisia pygmaea)
Distribution: Occurring in the Olympic and Cascade Mountains of Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Open, often gravelly, moist to rather dry areas, mid- to high elevations in the mountains.
Origin: Native
Flowers: May-August
Leatherflower (Clematis hirsutissima)
Distribution: Occurring in only a few counties in central and eastern Washington; Washington south to Oregon, east to Montana, south to Arizona and New Mexico.
Habitat: Meadows, grasslands, and forest openings.
Origin: Native
Flowers: May-June
Three-corner leek (Allium triquetrum)
Origin: Introduced
Lemonbalm (Melissa officinalis)
Distribution: Scattered localities across Washington; Alaska south to California; central and eastern North America.
Habitat: Roadsides and other disturbed habitats.
Origin: Introduced from Eurasia
Flowers: June - August
Wild lemonweed (Ladeania 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
Flowers: May-June
Water lentil (Lemna minor)
Distribution: Cosmopolitan in temperate and subtropical regions
Habitat: In standing or slow-moving fresh water
Origin: Native
Flowers: June - October
Great leopard's-bane (Doronicum pardalianches)
Distribution: Known from Skamania County in Washington; southwestern British Columbia to Portland Oregon.
Habitat: Disturbed, open, generally moist soil
Origin: Introduced
Flowers: March-November
Cordilleran leopardbane (Arnica mollis)
Distribution: In the mountains from British Columbia to California, east to Alberta and Colorado
Habitat: Frequent in moist meadows at mid- to high elevations in the mountains
Origin: Native
Flowers: June - September
Daffodil leopardbane (Arnica latifolia)
Distribution: Both sides of the Cascades in Washington; Alaska south through Washington.
Habitat: Common in open forests and open, rocky areas at mid- to high elevations in the mountains.
Origin: Native
Flowers: June-August
Hear-leaf leopardbane (Arnica cordifolia)
Distribution: Pacific Northwest, including southern British Columbia, and east into the Rocky Mountains
Habitat: Moderately dry, open forests from fairly low (where common) to sub-alpine
Origin: Native
Flowers: April - July
Shining leopardbane (Arnica fulgens)
Distribution: British Columbia to California, uncommon east to North Dakota; east of the Cascades in Washington and Oregon
Habitat: Open places from the foothills to moderate elevations in the mountains
Origin: Native
Flowers: May - July
Sierran leopardbane (Arnica nevadensis)
Distribution: Cascade and Olympic Mountains of Washington, south to California; rare in our range.
Habitat: Open, rocky slopes at high elevations in the mountains.
Origin: Native
Flowers: July - August
Slender leopardbane (Arnica gracilis)
Distribution: Occurring in mountainous areas throughout Washington; British Columbia south to California, east to Colorado and Utah.
Habitat: Rocky places, usually at rather high elevations in the mountains.
Origin: Native
Flowers: June-July
Spear-leaf leopardbane (Arnica longifolia)
Distribution: Southern Alberta south to Washington, Colorado and California.
Habitat: Rocky soil in seeps or springs, cliffs, or riverbanks, at moderate to high elevations in the mountains.
Origin: Native
Flowers: July - September
Subalpine leopardbane (Arnica rydbergii)
Distribution: British Columbia south to northern California, east to Alberta and Colorado.
Habitat: Dry meadows and open slopes at high elevations in the mountains.
Origin: Native
Flowers: July - August
Twin leopardbane (Arnica sororia)
Distribution: Chiefly east of the Cascades, British Columbia to California, east to Wyoming.
Habitat: Open, often rather dry places, but usually vernally moist, in the foothills and at moderate elevations in the mountains.
Origin: Native
Flowers: May - July
Blue lettuce (Lactuca tatarica)
Origin: Native
Canadian wild lettuce (Lactuca canadensis)
Distribution: Widespread in eastern United States; occasionally introduced in the Pacific Northwest.
Habitat: Fields, woodlands and waste places.
Origin: Introduced from eastern North America
Flowers: July - September
Cushion miner's lettuce (Claytonia rubra)
Distribution: Throughout much of Western U.S., north to southern B.C.
Habitat: Sandy areas, shrublands, dry coniferous woods
Origin: Native
Flowers: April - July
Erubescent lettuce (Claytonia rubra)
Distribution: Throughout much of Western U.S., north to southern B.C.
Habitat: Sandy areas, shrublands, dry coniferous woods
Origin: Native
Flowers: April - July
Florida blue lettuce (Lactuca canadensis)
Distribution: Widespread in eastern United States; occasionally introduced in the Pacific Northwest.
Habitat: Fields, woodlands and waste places.
Origin: Introduced from eastern North America
Flowers: July - September
Garden lettuce (Lactuca sativa)
Distribution: Occurring in scattered locations in Washington; Washington south to California, east to Idaho; in scattered locations in the central U.S., more commonly distributed in eastern North America.
Habitat: Disturbed areas, often escaping from cultivation.
Origin: Introduced
Flowers: July-September
Great lettuce (Lactuca virosa)
Distribution: Known from Puget Trough region in Washington; also in California, Mississippi, and Maryland.
Habitat: Disturbed, open areas at low elevations including wastelots and roadsides.
Origin: Introduced
Flowers: May-October
Indian lettuce (Claytonia parviflora)
Distribution: Occurring on both sides of the Cascades in Washington; southern British Columbia to California, east to Montana, Idaho, Nevada, Arizona, and Utah.
Habitat: Open rocky areas, open forest, forest edge, and disturbed areas.
Origin: Native
Flowers: March-June
Intermountain miners lettuce (Claytonia perfoliata)
Distribution: Widely distributed throughout Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Forest openings and margins, shaded rock crevices, and open areas where seasonally moist from the coast to middle elevations in the mountains.
Origin: Native
Flowers: April-June
Least lettuce (Lactuca saligna)
Distribution: Occurring in scattered locations in Washington; Washington south to California, east across the southwestern U.S. to the central U.S. and northeastern North America.
Habitat: Disturbed areas, roadsides, and meadows.
Origin: Introduced
Flowers: August-October
Lineleaf Indian lettuce (Montia linearis)
Distribution: Widely distributed throughout much of Washington; British Columbia south to Calfornia, east to the Rocky Mountains of Canada and the U.S.
Habitat: Moist to dry, usually sandy soil, low to moderate elevations.
Origin: Native
Flowers: April-July
Louisiana lettuce (Lactuca ludoviciana)
Origin: Introduced
Flowers: July - September
Miners lettuce (Claytonia perfoliata)
Distribution: Widely distributed throughout Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Forest openings and margins, shaded rock crevices, and open areas where seasonally moist from the coast to middle elevations in the mountains.
Origin: Native
Flowers: April-June
Prairie lettuce (Lactuca ludoviciana)
Origin: Introduced
Flowers: July - September
Prickly lettuce (Lactuca serriola)
Distribution: Occurring on both sides of the Cascades in Washington; common and widespread throughout much of North America.
Habitat: Fields and waste places.
Origin: Introduced from Europe
Flowers: July-September
Red miners lettuce (Claytonia rubra)
Distribution: Throughout much of Western U.S., north to southern B.C.
Habitat: Sandy areas, shrublands, dry coniferous woods
Origin: Native
Flowers: April - July
Tall blue lettuce (Lactuca biennis)
Distribution: Alaska to Newfoundland, south to California and North Carolina.
Habitat: Moist places.
Origin: Native
Flowers: July - August
Tall lettuce (Lactuca virosa)
Distribution: Known from Puget Trough region in Washington; also in California, Mississippi, and Maryland.
Habitat: Disturbed, open areas at low elevations including wastelots and roadsides.
Origin: Introduced
Flowers: May-October
Wall lettuce (Mycelis muralis)
Distribution: Occurring on both sides of the Cascades crest in Washington, but more common on the west side; British Columbia to Oregon; eastern North America.
Habitat: Roadsides and waste ground from the lowlands to mid-elevations in the mountains.
Origin: Introduced from Europe
Flowers: July-September
Western lettuce (Lactuca ludoviciana)
Origin: Introduced
Flowers: July - September
Wild blue lettuce (Lactuca biennis)
Distribution: Alaska to Newfoundland, south to California and North Carolina.
Habitat: Moist places.
Origin: Native
Flowers: July - August
Wild lettuce (Lactuca virosa)
Distribution: Known from Puget Trough region in Washington; also in California, Mississippi, and Maryland.
Habitat: Disturbed, open areas at low elevations including wastelots and roadsides.
Origin: Introduced
Flowers: May-October
Willow lettuce (Lactuca saligna)
Distribution: Occurring in scattered locations in Washington; Washington south to California, east across the southwestern U.S. to the central U.S. and northeastern North America.
Habitat: Disturbed areas, roadsides, and meadows.
Origin: Introduced
Flowers: August-October
Wire lettuce (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
Flowers: June-September
Alpine lewisia (Lewisia pygmaea)
Distribution: Occurring in the Olympic and Cascade Mountains of Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Open, often gravelly, moist to rather dry areas, mid- to high elevations in the mountains.
Origin: Native
Flowers: May-August
Columbia lewisia (Lewisia columbiana)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Idaho and Montana.
Habitat: Open gravelly or rocky slopes and rock crevices at mid- to high elevations in the mountains.
Origin: Native
Flowers: May-August
Dwarf lewisia (Lewisia pygmaea)
Distribution: Occurring in the Olympic and Cascade Mountains of Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Open, often gravelly, moist to rather dry areas, mid- to high elevations in the mountains.
Origin: Native
Flowers: May-August
Siskiyou lewisia (Lewisia cotyledon)
Origin: Introduced
Three leaf lewisia (Lewisia triphylla)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Washington to California, east to Montana and south in the Rocky Mountains.
Habitat: Open, usually sandy areas where vernally moist, ponderosa pine forests to subalpine meadows.
Origin: Native
Flowers: May-August
Tweedy's lewisia (Lewisiopsis tweedyi)
Distribution: Occurring in Kittitas, Chelan, and Okanogan counties in Washington; endemic to southern British Columbia and north-central Washington.
Habitat: Rock outcroppings and dry slopes of open Ponderosa pine/Douglas fir forests.
Origin: Native
Flowers: April-June
American licorice (Glycyrrhiza lepidota)
Distribution: Distributed east of the Cascades in Washington; British Columbia to Ontario, south to California and Texas.
Habitat: A plant of waste places and low ground, common along streams.
Origin: Native
Flowers: May-August
Wild licorice (Glycyrrhiza lepidota)
Distribution: Distributed east of the Cascades in Washington; British Columbia to Ontario, south to California and Texas.
Habitat: A plant of waste places and low ground, common along streams.
Origin: Native
Flowers: May-August
Common lilac (Syringa vulgaris)
Origin: Introduced
Western lilaeopsis (Lilaeopsis occidentalis)
Distribution: Southern Vancouver Island to California, including the Puget Sound region.
Habitat: Marshes, salt flats, muddy or sandy beaches and shores along and near the coast
Origin: Native
Flowers: June - July
Alpine lily (Lloydia serotina)
Distribution: In the Olympic and Cascade mountains of Washington; Alaska south to Oregon, east to Montana and Alberta, and south in the Rockies to New Mexico.
Habitat: Gravelly ridges, cliffs and rock crevices at high elevations.
Origin: Native
Flowers: June-September
Big-pod mariposa lily (Calochortus eurycarpus)
Distribution: Occurring in southeastern Washington; eastern Oregon, east to Montana and Wyoming.
Habitat: Grasslands and open coniferous forests at moderate elevations.
Origin: Native
Flowers: June-August
Black lily (Fritillaria camschatcensis)
Distribution: Chiefly northern Puget Sound lowlands in Washington; Kodiak Island and coastal Alaska south to Washington.
Habitat: Moist areas from near tide flats to mountain meadows.
Origin: Native
Flowers: May-July
Blue umber lily (Triteleia grandiflora)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to California, east to Montana, Idaho, Wyoming and Utah.
Habitat: Prairies, grasslands, balds and forest openings, often where seasonally dry, from the coast to moderate elevations in the mountains.
Origin: Native
Flowers: May-June
Broad-fruited mariposa lily (Calochortus nitidus)
Distribution: Occurring in Whitman County in Washington; Washington east to adjacent areas of Idaho and in northeast Oregon.
Habitat: Meadows at low elevation.
Origin: Native
Flowers: June-July
Checker lily (Fritillaria affinis)
Distribution: On both sides of the Cascades in Washington; British Columbia south to California, east to Idaho.
Habitat: Prairies and grassy bluffs to woodlands and coniferous forests, sea level to fairly high elevations in the mountains.
Origin: Native
Flowers: April-June
Chocolate lily (Fritillaria affinis)
Distribution: On both sides of the Cascades in Washington; British Columbia south to California, east to Idaho.
Habitat: Prairies and grassy bluffs to woodlands and coniferous forests, sea level to fairly high elevations in the mountains.
Origin: Native
Flowers: April-June
Coast fawn lily (Erythronium revolutum)
Distribution: West of the Cascades in Washington; southern British Columbia south to northwest California.
Habitat: Along river banks and the edge of woods, in open or in moderate shade.
Origin: Native
Flowers: April-May
Columbian lily (Lilium columbianum)
Distribution: Widely distributed throughout Washington; British Columbia south to California, east to Idaho.
Habitat: Prairies, woods and coniferous forests, sea level to mid-elevations in drier areas.
Origin: Native
Flowers: May-August
Giant fawn lily (Erythronium oregonum)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California.
Habitat: Prairies, rocky balds, moist woods; at low elevations.
Origin: Native
Flowers: March-May
Mahogany fawn lily (Erythronium revolutum)
Distribution: West of the Cascades in Washington; southern British Columbia south to northwest California.
Habitat: Along river banks and the edge of woods, in open or in moderate shade.
Origin: Native
Flowers: April-May
Olympic fawn lily (Erythronium quinaultense)
Distribution: Southwestern portion of Olympic peninsula, Washington.
Habitat: Openings and rocky ledges in coniferous forests.
Origin: Native
Flowers: May - June
Pale fawn lily (Erythronium idahoense)
Origin: Native
Flowers: March - August
Peruvian lily (Alstroemeria aurea)
Origin: Introduced from Chile
Pink fawn lily (Erythronium revolutum)
Distribution: West of the Cascades in Washington; southern British Columbia south to northwest California.
Habitat: Along river banks and the edge of woods, in open or in moderate shade.
Origin: Native
Flowers: April-May
Quinault trout lily (Erythronium quinaultense)
Distribution: Southwestern portion of Olympic peninsula, Washington.
Habitat: Openings and rocky ledges in coniferous forests.
Origin: Native
Flowers: May - June
White avalanche lily (Erythronium montanum)
Distribution: Occurring chiefly west of the Cascades crest in Washington; Vancouver Island, British Columbia south to Oregon.
Habitat: Forest openings and mountain meadows, subalpine to alpine.
Origin: Native
Flowers: June-August
Wild easter lily (Erythronium oregonum)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California.
Habitat: Prairies, rocky balds, moist woods; at low elevations.
Origin: Native
Flowers: March-May
Yellow fawn lily (Erythronium idahoense)
Origin: Native
Flowers: March - August
Yellow pond lily (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
Flowers: May-August
European lily-of-the-valley (Convallaria majalis)
Distribution: Introduced over much of eastern and central United States; occasional escape in Washington.
Habitat: Disturbed, open areas.
Origin: Introduced
Flowers: April - May
Wild lily-of-the-valley (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
Flowers: May-July
Baker's linanthus (Leptosiphon bolanderi)
Distribution: Near the east base of the Cascades in Klickitat County, Washington, and in the Sierra Nevada and Coast Range of California.
Habitat: Dry, open places at lower elevations, often on serpentine.
Origin: Native
Flowers: April-May
Bicolored linanthus (Leptosiphon bicolor)
Distribution: Occurring chiefly west of the Cascades crest in Washington; Vancouver Island, B. C. south to California.
Habitat: Open areas at lower elevations.
Origin: Native
Flowers: April-June
Harkness' linanthus (Leptosiphon harknessii)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Utah.
Habitat: Drier open places, foothills to mid-elevations in the mountains.
Origin: Native
Flowers: June-August
Northern linanthus (Leptosiphon septentrionalis)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to northern Rocky Mountains and Great Plains.
Habitat: In seasonally wet open plains and slopes from low to moderate elevations.
Origin: Native
Flowers: May-July
Nuttall's linanthus (Leptosiphon nuttallii)
Distribution: In the Cascade and Blue Mountains of Washington; Washington south to California, east to Montana, Colorado and New Mexico.
Habitat: Open rocky slopes at mid- to high elevations in the mountains.
Origin: Native
Flowers: June-August
Thread-stem linanthus (Leptosiphon liniflorus)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California.
Habitat: open, dry areas in sagebrush flats to Ponderosa pine forests.
Origin: Native
Flowers: April-June.
Thread-stemmed linanthus (Leptosiphon liniflorus)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California.
Habitat: open, dry areas in sagebrush flats to Ponderosa pine forests.
Origin: Native
Flowers: April-June.
Large-flowered linaria (Linaria grandiflora)
Origin: Introduced
Small-leaved linden (Tilia cordata)
Origin: Introduced
Linseed (Linum usitatissimum)
Origin: Introduced
Flowers: June - November
Lace lip fern (Myriopteris gracillima)
Distribution: Occurring on both sides of the Cascades in Washington; southern British Columbia to California, east to western Montana, Idaho, Nevada and Utah.
Habitat: Cliffs and rocky slopes from montane to subalpine.
Origin: Native
Brook lobelia (Lobelia kalmii)
Origin: Native
Flowers: July - August
Trailing lobelia (Lobelia erinus)
Origin: Introduced
Water lobelia (Lobelia dortmanna)
Distribution: West of the Cascades in Washington; Vancouver Island and adjacent mainland in British Columbia, south to the Cascades of northern Oregon.
Habitat: In shallow water at the margins of ponds and lakes.
Origin: Native
Flowers: June-August
Field locoweed (Oxytropis campestris)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to Oregon, east to Wisconsin and Quebec, south in the Rockies to Colorado.
Habitat: Forest openings and rocky balds from sea-level to the alpine.
Origin: Native
Flowers: May-July
Yellow locoweed (Oxytropis campestris)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to Oregon, east to Wisconsin and Quebec, south in the Rockies to Colorado.
Habitat: Forest openings and rocky balds from sea-level to the alpine.
Origin: Native
Flowers: May-July
Black locust (Robinia pseudoacacia)
Distribution: Native to eastern United States, and widely introduced in the West
Habitat: Common around old homesteads, along river banks
Origin: Introduced
Flowers: May - June
Bristly locust (Robinia hispida)
Distribution: Introduced as an ornamental, occasionally escaping.
Habitat: Disturbed soil.
Origin: Introduced
Flowers: June - July
Honey locust (Gleditsia triacanthos)
Distribution: Occurring east of the Cascades crest in Washington; native to eastern and central North America, but escaped widely throughout western North America.
Habitat: On edge of riparian zones, typically in areas with some level of disturbance.
Origin: Introduced
Flowers: April-June
Barestem lomatium (Lomatium nudicaule)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Idaho and Utah.
Habitat: Dry, open areas; common in shrub-steppe, but found in mountain meadows.
Origin: Native
Flowers: April-June
Bigseed lomatium (Lomatium macrocarpum)
Distribution: East of the Cascades in Washington; British Columbia south to California, east to North Dakota, Wyoming and Utah.
Habitat: Open, dry, rocky areas at low elevations.
Origin: Native
Flowers: March-May
Coast range lomatium (Lomatium martindalei)
Distribution: Distributed on both sides of the Cascades in Washington; British Columbia south to Oregon.
Habitat: Dry mountain meadows, often rocky areas.
Origin: Native
Flowers: May-September
Gray's lomatium (Lomatium grayi)
Distribution: Widespread east of the Cascades from low to moderate elevations in Washington; British Columbia south to Nevada, east to the Rocky Mountains.
Habitat: Typically in rocky draws where moist in spring, also on rock outcrops.
Origin: Native
Flowers: April-May
Hamblen's lomatium (Lomatium farinosum)
Distribution: Chelan to Yakima Counties, Washington, east to Montana.
Habitat: Rocky slopes and scablands, often on lithosol and with sagebrush.
Origin: Native
Flowers: April - May
Hoover's lomatium (Lomatium tuberosum)
Distribution: Scattered locations in Yakima County, Washington, and adjacent counties.
Habitat: Rocky slopes and talus.
Origin: Native
Flowers: March - April
Lacy lomatium (Lomatium ambiguum)
Distribution: Chiefly east of the Cascades in Washington; southern British Columbia south to northeast Oregon, east to western Montana.
Habitat: Open, often rocky slopes and flats, from the foothills to moderate elevations in the mountains.
Origin: Native
Flowers: May-July
Milfoil lomatium (Lomatium grayi)
Distribution: Widespread east of the Cascades from low to moderate elevations in Washington; British Columbia south to Nevada, east to the Rocky Mountains.
Habitat: Typically in rocky draws where moist in spring, also on rock outcrops.
Origin: Native
Flowers: April-May
Nine-leaf lomatium (Lomatium anomalum)
Origin: Native
Piper's lomatium (Lomatium piperi)
Distribution: East of the Cascades in Washington; central Washington south to northern California.
Habitat: Sagebrush-bunchgrass steppe up to ponderosa pine forests.
Origin: Native
Flowers: April-June
Smooth lomatium (Lomatium laevigatum)
Distribution: Along the Columbia River in Klickitat County, Washington, and adjacent Oregon.
Habitat: Crevices is basalt cliffs.
Origin: Native
Flowers: April
Wenatchee Mountain lomatium (Lomatium cuspidatum)
Distribution: Endemic to the Wenatchee Mountains of Chelan and Kittitas Counties, Washington.
Habitat: Open, rocky slopes, often on serpentine, between 2500-6000 ft.
Origin: Native
Flowers: May-July
False loosestrife (Ludwigia hexapetala)
Distribution: Scattered locations throughout Washington; along Columbia River near Portland, OR, introduced in much of North America.
Habitat: Swamps, lakes, and streams.
Origin: Introduced from South America
Flowers: June-August
Hyssop loosestrife (Lythrum hyssopifolia)
Distribution: Scattered locations on both sides of the Cascades in Washington; British Columbia south to California; eastern North America.
Habitat: Moist, disturbed areas.
Origin: Introduced
Flowers: May-September
Lance-leaved yellow loosestrife (Lysimachia hybrida)
Origin: Introduced
Lowland loosestrife (Lysimachia hybrida)
Origin: Introduced
Mississippi loosestrife (Lysimachia hybrida)
Origin: Introduced
Purple loosestrife (Lythrum salicaria)
Distribution: Widely distributed throughout Washington; widely distributed throughout North America.
Habitat: Noxious weed of standing water and wet ground.
Origin: Introduced from Europe
Flowers: July-September
Spatula-leaf loosestrife (Lythrum portula)
Distribution: Chiefly west of the Cascades in Washington; British Columbia south to California.
Habitat: Wetlands, disturbed moist areas.
Origin: Introduced
Flowers: June-September
Big lotus (Lotus uliginosus)
Distribution: West of the Cascades in Washington; British Columbia south to California, east to Idaho; east across Canada to Nova Scotia; scattered localities in eastern U.S.
Habitat: Moist to wet disturbed areas, roadsides, abandoned lots, and coastal tidelands.
Origin: Introduced
Flowers: May-July
Bird's beak lousewort (Pedicularis ornithorhynchos)
Distribution: In the Cascades of Washington; Alaska south to Washington.
Habitat: High mountain meadows.
Origin: Native
Flowers: July-September
Bracted lousewort (Pedicularis bracteosa)
Distribution: Widely distributed throughout the mountainous areas of Washington; British Columbia south to California, east to Montana, Colorado and New Mexico.
Habitat: Common in open forests at moderate to high elevations in the mountains.
Origin: Native
Flowers: June-August
Leafy lousewort (Pedicularis racemosa)
Distribution: Widely distributed across Washington; British Columbia south to California, east to Montana, Colorado and New Mexico.
Habitat: Coniferous forests at mid-elevations in the mountains.
Origin: Native
Flowers: June-September
Mt. Rainier lousewort (Pedicularis rainierensis)
Distribution: Endemic to Mt. Rainier and adjacent areas.
Habitat: Moist alpine meadows.
Origin: Native
Flowers: July-August
Pretty dwarf lousewort (Pedicularis pulchella)
Origin: Native
Sickletop lousewort (Pedicularis racemosa)
Distribution: Widely distributed across Washington; British Columbia south to California, east to Montana, Colorado and New Mexico.
Habitat: Coniferous forests at mid-elevations in the mountains.
Origin: Native
Flowers: June-September
White coiled-beak lousewort (Pedicularis contorta)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Montana and south to Wyoming.
Habitat: Open wooded slopes and drier meadows at high elevations in the mountains.
Origin: Native
Flowers: June-August
Canby's wild lovage (Ligusticum canbyi)
Distribution: On both sides of the Cascades crest in Washington; east to Montana and Wyoming, south to Oregon.
Habitat: Wet to somewhat dry soil, from montane to subalpine and alpine areas.
Origin: Native
Flowers: May-August
Celery-leaf wild lovage (Ligusticum apiifolium)
Distribution: West of the Cascades, Washington to central California.
Habitat: Thickets, fence rows, sparcely-wooded slopes and prairies.
Origin: Native
Flowers: May - July
Gray's lovage (Ligusticum grayi)
Distribution: Widely distributed throughout the mountain regions of Washington; east to Idaho, south to California and Nevada.
Habitat: Moist or sometimes dry open slopes and drier meadows in subalpine and alpine areas.
Origin: Native
Flowers: July-September
Sheep wild lovage (Ligusticum grayi)
Distribution: Widely distributed throughout the mountain regions of Washington; east to Idaho, south to California and Nevada.
Habitat: Moist or sometimes dry open slopes and drier meadows in subalpine and alpine areas.
Origin: Native
Flowers: July-September
India lovegrass (Eragrostis pilosa)
Origin: Introduced
Flowers: October
Little lovegrass (Eragrostis minor)
Origin: Introduced from Europe
Mexican lovegrass (Eragrostis mexicana)
Origin: Introduced
Tufted lovegrass (Eragrostis pectinacea)
Origin: Native
Flowers: June - September
Weeping lovegrass (Eragrostis curvula)
Distribution: In scattered locations across Washington; occurring from West to East Coast of U.S., typically in the southern half of the country.
Habitat: Distrubed areas where open and forest edge.
Origin: Introduced from southern Africa
Flowers: June-July
Lucerne (Medicago sativa)
Distribution: Introduced as a forage crop in the temperate regions of the world
Habitat: Near cultivated fields, roadsides, often on dry ground
Origin: Introduced
Flowers: June - October
Littleleaf luina (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
Flowers: June-October
Silverback luina (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
Flowers: June-October
Silvercrown luina (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
Flowers: May-July
Tongue leaved luina (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
Flowers: July-August
Leafy lungwort (Mertensia oblongifolia)
Distribution: Uncommon east of the Cascades in Washington to California, east to South Dakota
Habitat: Deeper soils in shrub-steppe
Origin: Native
Flowers: June - August
Long-flowered lungwort (Mertensia longiflora)
Distribution: Chiefly east of the Cascades, British Columbia to California, east to Montana
Habitat: Drier areas, foothills to moderate elevations in the mountains
Origin: Native
Flowers: April - June
Oval lungwort (Pulmonaria ovalis)
Origin: Introduced
Shade lungwort (Mertensia umbratilis)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to Oregon.
Habitat: Forest openings and seasonally moist areas at low to middle elevations.
Origin: Native
Flowers: April-May
Big-pod lupine (Lupinus pachylobus)
Origin: Native?
Bigleaf lupine (Lupinus polyphyllus)
Distribution: Widely distributed throughout Washington; British Columbia south to California, east to Colorado.
Habitat: Moist areas and stream banks, low to fairly high elevations.
Origin: Native
Flowers: June-September
Broadleaf lupine (Lupinus latifolius)
Distribution: In the Olympic and Cascade mountains of Washington; British Columbia south to California.
Habitat: Chiefly in forest openings at mid-elevation to subalpine meadows.
Origin: Native
Flowers: June-August
Chick lupine (Lupinus microcarpus)
Distribution: Chiefly west of the Cascades in Washington, though also known from east of Cascades; British Columbia south to California.
Habitat: Coastal bluffs, grassy balds, and other dry, open areas at low elevations.
Origin: Native
Flowers: April-June
Large-leaved lupine (Lupinus polyphyllus)
Distribution: Widely distributed throughout Washington; British Columbia south to California, east to Colorado.
Habitat: Moist areas and stream banks, low to fairly high elevations.
Origin: Native
Flowers: June-September
Low lupine (Lupinus pusillus)
Distribution: Occurring east of the Cascades crest in south-central Washington; Washington south to California, east to the Rocky Mountains and Great Plains of Canada and the U.S.
Habitat: Shrub-steppe habitat, often where sandy.
Origin: Native
Flowers: May-June
Nootka lupine (Lupinus nootkatensis)
Origin: Native
Oregon lupine (Lupinus oreganus)
Distribution: West of the Cascades in Washington; south to Willamette Valley in Oregon.
Habitat: Moist to dry areas of prairies and openings in oak woodlands.
Origin: Native
Flowers: April-June
Prairie lupine (Lupinus lepidus)
Distribution: Widely distributed throughout Washington; Alaska south to California, east to the Rocky Mountains.
Habitat: Open areas from low elevations to the alpine.
Origin: Native
Flowers: June-August
River-bank lupine (Lupinus rivularis)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California.
Habitat: Gravelly prairies, open woods and river banks at low elevations.
Origin: Native
Flowers: April-September
Rock lupine (Lupinus saxosus)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Idaho and Nevada.
Habitat: Shrub-steppe habitat.
Origin: Native
Flowers: April-May
Rusty lupine (Lupinus pusillus)
Distribution: Occurring east of the Cascades crest in south-central Washington; Washington south to California, east to the Rocky Mountains and Great Plains of Canada and the U.S.
Habitat: Shrub-steppe habitat, often where sandy.
Origin: Native
Flowers: May-June
Sabin's lupine (Lupinus sabinianus)
Distribution: Blue Mountains of southeast Washington; south to northeast Oregon.
Habitat: Forest openings and grasslands at low to moderate elevations.
Origin: Native
Flowers: May-June
Seashore lupine (Lupinus littoralis)
Distribution: Coastal from British Columbia to California
Habitat: Near the shore along the coast
Origin: Native
Flowers: May - August
Sicklekeel lupine (Lupinus albicaulis)
Distribution: Chiefly west of the Cascades in Washington; Washington south to California.
Habitat: Grasslands and prairies from the lowlands to moderate elevations.
Origin: Native
Flowers: May-July
Silky lupine (Lupinus sericeus)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to Oregon, east to Alberta and south to Arizona.
Habitat: Sagebrush deserts to forest openings at moderate elevations.
Origin: Native
Flowers: May-August
Silvery lupine (Lupinus arbustus)
Distribution: East of the Cascades crest in Washington; British Columbia south to California, east to Montana and Utah.
Habitat: Sagebrush deserts and ponderosa pine forest openings.
Origin: Native
Flowers: May-July
Silvery lupine (Lupinus argenteus)
Distribution: Chiefly east of the Cascades in Washington; British Columbia south to California, east to the Dakotas and New Mexico.
Habitat: Ponderosa pine forests to subalpine ridges.
Origin: Native
Flowers: May-July
Small-flower lupine (Lupinus bicolor)
Distribution: Chiefly west of the Cascades in Washington, but also in southeastern part of state; British Columbia south to California, east to Arizona.
Habitat: Open meadows, grasslands, prairies, and sandy riverbanks at low to moderate elevations.
Origin: Native
Flowers: April-July
Spurred lupine (Lupinus arbustus)
Distribution: East of the Cascades crest in Washington; British Columbia south to California, east to Montana and Utah.
Habitat: Sagebrush deserts and ponderosa pine forest openings.
Origin: Native
Flowers: May-July
Sulfur lupine (Lupinus sulphureus)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California.
Habitat: Shrub-steppe, grassland, and open ponderosa pine forests.
Origin: Native
Flowers: April-June
Tree lupine (Lupinus arboreus)
Distribution: Occurring in the western Washington lowlands and along the Pacific coast; British Columbia south to California.
Habitat: Sandy soil.
Origin: Introduced
Flowers: May-September
Two-color lupine (Lupinus bicolor)
Distribution: Chiefly west of the Cascades in Washington, but also in southeastern part of state; British Columbia south to California, east to Arizona.
Habitat: Open meadows, grasslands, prairies, and sandy riverbanks at low to moderate elevations.
Origin: Native
Flowers: April-July
Velvet lupine (Lupinus leucophyllus)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to Montana, Wyoming, and Colorado.
Habitat: Shrub-steppe and ponderosa pine forests.
Origin: Native
Flowers: June-August
Yellow-bush lupine (Lupinus arboreus)
Distribution: Occurring in the western Washington lowlands and along the Pacific coast; British Columbia south to California.
Habitat: Sandy soil.
Origin: Introduced
Flowers: May-September
Lutkea (Luetkea pectinata)
Distribution: Occurring in the Olympics and Cascades mountains in Washington; Alaska south to California, and in the Rocky Mountains.
Habitat: Usually on sandy soil in moist or shady places, subalpine to alpine.
Origin: Native
Flowers: June-August