Vascular Plants

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Scientific names beginning with L:
Laburnum anagyroidesgolden chain-tree
Distribution: Occurring chiefly west of the Cascades crest at low elevations in Washington; British Columbia south to California, Utah.
Habitat: Disturbed sites often in proximity to residential development where escaped from cultivation.
Lactuca biennistall blue lettuce, wild blue lettuce
Distribution: Alaska to Newfoundland, south to California and North Carolina.
Habitat: Moist places.
Lactuca canadensisCanadian wild lettuce, Florida blue lettuce
Distribution: Widespread in eastern United States; occasionally introduced in the Pacific Northwest.
Habitat: Fields, woodlands and waste places.
Lactuca ludovicianaLouisiana lettuce, prairie lettuce, western lettuce
Lactuca salignaleast lettuce, willow lettuce
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.
Lactuca sativagarden lettuce
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.
Lactuca serriolaprickly lettuce
Distribution: Occurring on both sides of the Cascades in Washington; common and widespread throughout much of North America.
Habitat: Fields and waste places.
Lactuca virosagreat lettuce, tall lettuce, wild lettuce
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.
Laedeania lanceolatawild lemonweed, lance-leaf scurf pea, scurf-pea
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.
Lagophylla ramosissimaslender hareleaf, common rabbitleaf
Distribution: Occurring east of the Cascades in Washington; Washington south to California, east to Montana, Idaho, and Nevada.
Habitat: Dry, open areas of foothills and plains.
Lallemantia peltatalion's heart
Lamiastrum galeobdolonyellow archangel
Distribution: West of the Cascades in Washington; California and scattered localities in eastern U.S.
Habitat: Introduced as an ornamental, escaping in lowland forest understory and disturbed soil in shaded areas.
Lamium amplexicaulecommon dead-nettle, giraffehead
Distribution: Both sides of the Cascades in Washington; introduced and widespread in North America; Eurasia and North Africa.
Habitat: Weed in distrurbed areas, fields, lawns.
Lamium hybridumcutleaf dead-nettle
Lamium maculatumspotted hen-nettle, spotted henbit
Distribution: Chiefly west of the Cascades in Washington; Alaska, Oregon, Idaho; eastern North America.
Habitat: Disturbed ground.
Lamium purpureumred dead-nettle, henbit
Distribution: Both sides of the Cascades in Washington, but more common on the west side; introduced throughout North America.
Habitat: Weed in distrurbed areas, fields, lawns at lower elevations.
Lappula redowskii
Distribution: East of the Cascades in the Pacific Northwest; Eurasia.
Habitat: A weed in dry, disturbed places, along roadsides and on overgrazed ranges.
var. cupulata – cupped stickseed
var. redowskii – western stickseed
Lappula squarrosabristly sheepburr, bristly stickseed, common stickseed, European stickseed, bristly-fruited tickweed
Distribution: Occurring east of the Cascades crest in Washington; widely distributed throughout much of North America; Eurasia.
Habitat: Shrub-steppe, disturbed areas, roadside.
Lapsana communiscommon nipplewort
Distribution: Occurring on both sides of the Cascades crest in Washington, but more often west of the crest; BC to CA, scattered elsewhere in western North America, and more common in central and eastern North America.
Habitat: Disturbed areas including roadsides, wastelots, fields, and forest edge.
Larix lyalliisubalpine larch
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.
Larix occidentaliswestern larch
Distribution: East of the Cascades, British Columbia to Oregon, east to Montana and Alberta
Habitat: Mountain valleys and lower slopes, often in swampy areas
Lasthenia glaberrimasmooth goldfields, smooth lasthenia
Distribution: West of the Cascades, southwest Washington south to central California.
Habitat: Wet or muddy ground at low elevations, including venral pools.
Lasthenia maritimamaritime goldfields, seaside goldfields
Distribution: Coastal southern British Columbia to California.
Habitat: Rocky beaches.
Lasthenia minorcoastal goldfields
Lathrocasis tenerrimadelicate gilia
Distribution: Known from Okanogan, Douglas, and Chelan counties in Washington; British Columbia south to California, east to Montana, Idaho, Wyoming, Utah and Nevada.
Habitat: Rocky outcroppings, Ponderosa pine forest openings, and montane shrub-steppe communities.
Lathyrus aphacayellow vetchling
Distribution: Known only from the San Juan Islands in Washington; Washington south to California, and in scattered locations in central and southern U.S.
Habitat: Disturbed ground.
Lathyrus bijugatusdrypark pea
Lathyrus holochlorusthin-leaf vetchling
Distribution: Occurring west of the Cascades crest in Washington; Washington south to Oregon.
Habitat: Fence rows and partially cleared land.
Lathyrus japonicus
Distribution: Coastal in Washington; Alaska south to California; also along the Atlantic Coast.
Habitat: Sandy beaches, dunes, and headlands along the coast.
var. maritimus – beach pea
Lathyrus lanszwertii
Distribution: Occurring chiefly east of the Cascades crest in Washington; Washington south to California, east to Idaho and Utah.
Habitat: Sagebrush-ponderosa pine woodland to moderate elevations in the mountains.
var. aridus – pinewoods peavine
var. lanszwertii – thick-leaved peavine
Lathyrus latifoliuseverlasting-pea
Distribution: Occurring in locations throughout much of Washington; widespread in North America.
Habitat: Found in a variety of disturbed habitats, usually where somewhat moist.
Lathyrus littoralisbeach peavine, silky beach vetchling
Distribution: Occurring in the coastal counties in Washington; British Columbia south to California.
Habitat: Sand dunes and sandy beaches.
Lathyrus nevadensis
Distribution: Occurring on both sides of the Cascades crest and in the southeast corner of the State; British Columbia south to California, east to Idaho.
Habitat: Open woods at moderate to mid-elevations.
var. cusickii – Cusick's pea
var. nevadensis – Sierra pea
Lathyrus ochroleucuscream pea
Distribution: Occurring east of the Cascades crest along the northern border in Washington; Alaska south to Washington, east across the northern U.S. and Canada to the Atlantic Coast.
Habitat: Moist woods, at the edge of thickets.
Lathyrus palustrismarsh pea
Distribution: Occurring along the Puget Sound and outer coast in Washington; widely distributed throughout most of North America except the Rocky Mountain and southeastern regions of the U.S.
Habitat: Chiefly in tidelands along the coast.
Lathyrus pauciflorus
Distribution: Occurring chiefly east of the Cascades crest in Washington;, Washington, south to California, east to Idaho and Arizona.
Habitat: Shrub-steppe to Ponderosa pine and higher open forests.
var. pauciflorus – few-flowered pea
Lathyrus polyphyllusleafy pea
Distribution: Occurring west of the Cascades crest in lowland Washington, and east up the Columbia River Gorge; Washington south to California.
Habitat: Prairies and open areas of low mountains.
Lathyrus pratensismeadow vetchling
Lathyrus sphaericusgrass pea
Lathyrus sylvestrisnarrow-leaf pea
Distribution: Occurring chiefly west of the Cascades in Washington.
Habitat: Roadsides and waste places at low elevations.
Lathyrus torreyiTorrey's pea
Distribution: Occurring west of the Cascades crest in Washington; Washington south to California.
Habitat: Open prairies and clearings in the woods at low elevations.
Lathyrus tuberosusearth-nut pea
Lathyrus vestitus
var. ochropetalus – Pacific pea, Pacific peavine
Layia glandulosawhite layia, white daisy tidytips
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.
Leersia oryzoidesrice cut grass
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia east to the Atlantic Coast, south throughout the U.S.
Habitat: Wet places, often in fairly deep water.
Lemna minorcommon duckweed, lesser duckweed, water lentil
Distribution: Cosmopolitan in temperate and subtropical regions
Habitat: In standing or slow-moving fresh water
Lemna minutaleast duckweed
Lemna trisulcaivy duckweed, ivy-leaved duckweed, star duckweed
Distribution: Throughout much of the temperate and subtropical regions of the world.
Habitat: Quiet streams and standing fresh water.
Lemna turioniferaturion duckweed
Distribution: Occurring in aquatic environments throughout Washington; cosmopolitan in temperate and subtropical regions.
Habitat: In standing or slow-moving fresh water.
Leontodon autumnalisautumn hawkbit
Distribution: Known from San Juan and Whatcom counties in Washington; Alaska to Oregon, east to Idaho and Montana; also in eastern North America.
Habitat: Roadsides, pastures, open fields and other disturbed areas primarily in the lowlands, but also found along roads at alpine elevations in the mountains (e.g., Mt. Baker area).
Leontodon hirtusrough hawkbit
Leontodon saxatilis
Distribution: Occurring in scattered locations in Washington, chiefly west of the Cascades crest; British Columbia south to California, Nevada, and Arizona; central and eastern U.S.
Habitat: Disturbed sites.
ssp. saxatilis – lesser hawkbit
Leonurus cardiacamotherwort, Lion's tail
Distribution: Scattered location in Washington; found occasionally in North America.
Habitat: Disturbed ground, often in association with cities and towns.
Lepidium appelianumglobepodded hoarycress, whitetop
Distribution: Widely distributed throughout many areas in Washington, though more common east of the Cascades crest; widely distributed throughout much of North America.
Habitat: Disturbed soil, waste areas, in dry and moist places.
Lepidium campestrefield cress, field peppergrass pepperwort
Distribution: Distributed across Washington in scattered locations; distributed throughout much of North America.
Habitat: Dry, disturbed areas.
Lepidium chalepensechalapa hoarycress, lens-podded hoarycress, Asian white-top
Distribution: Occurring east of the Cascades crest in Washington; widely distributed throughout much of North America.
Habitat: Disturbed areas, especially where dry, often associated with agriculture.
Lepidium densiflorumcommon peppergrass, elongate peppergrass, hairy-fruited peppergrass, large-fruited peppergrass, prairie peppergrass
Distribution: Chiefly east of the Cascades in Washington; widely distributed throughout North America.
Habitat: Dry, open areas.
Lepidium dictyotumalkali peppergrass, sharp-toothed peppergrass, veiny peppergrass
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Idaho, Nevada, and Utah.
Habitat: Open areas often where seasonally moist, such as vernal ponds; tolerant of alkaline soils.
Lepidium didymumlesser swinecress wartcress
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California and Arizona, and Texas eastward and northward to the Atlantic Coast.
Habitat: Roadsides, gardens and wasteland.
Lepidium drabaheart-podded hoarycress, hoary pepperwort
Distribution: Occurring chiefly east of the Cascades crest in Washington; widely distributed throughout much of North America.
Habitat: Widespread weed in lowlands.
Lepidium heterophyllumSmith's pepperwort
Distribution: West of the Cascades in Washington; British Columbia south to California; in scattered locations in eastern U.S.
Habitat: Roadsides, pastures, and other disturbed ground.
Lepidium latifoliumdittander, broad-leaved pepperwort peppergrass
Distribution: Chiefly east of the Cascades in Washington but also found in the western lowlands; widely distributed throughout central and western North America.
Habitat: Moist areas and irrigated land, but also on drier areas.
Lepidium nitidumshining peppergrass
Distribution: Known from Klickitat County in Washington; Washington south to California.
Habitat: Dry, open areas at low elevation.
Lepidium oxycarpumforked pepperwort, sharpfruited pepperwort
Distribution: Chiefly in south-central California, rare in the Pacific Northwest.
Habitat: Usually on saline soil.
Lepidium perfoliatumclasping-leaved peppergrass, round-leaved peppergrass, yellow-flowered peppergrass, clasping peppergrass pepperwort
Distribution: Chiefly east of the Cascades in Washington; widely distributed throughout North America.
Habitat: Disturbed areas, such as overgrazed land and waste areas, usually where dry.
Lepidium ramosissimumbranched peppergrass, dull peppergrass
Distribution: Chiefly east of the Cascades in Washington; widely distributed throughout much of western and northern North America.
Habitat: Sagebrush, ponderosa pine forest openings, roadsides, fields, and other disturbed open areas.
Lepidium sativumgarden cress pepperwort
Lepidium strictumupright peppergrass
Lepidium virginicum
Distribution: Throughout the United States, north to Alaska
Habitat: Weedy native of the lowlands
ssp. menziesii – coastal peppergrass, hairy peppergrass, Idaho peppergrass, Menzies' peppergrass, tall peppergrass, tall western peppergrass
Leptarrhena pyrolifoliapearleaf, leatherleaf saxifrage
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
Leptochloa fusca
Distribution: Occurring in a few scattered locations chiefly east of the Cascades crest in Washington; widely distributed throughout North America.
Habitat: Disturbed areas at low elevations.
ssp. fascicularis – bearded sprangletop
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.
Leptosiphon bolanderiBolander's desert-trumpets, Baker's linanthus, Baker's linanthus [H&C], Bolander's desert-trumpets [KZ]
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.
Leptosiphon harknessiiHarkness' linanthus, Harkness' linanthus [H&C], three-seed desert-trumpets [KZ]
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.
Leptosiphon liniflorusthread-stemmed linanthus, thread-stem linanthus [H&C], flax-flower desert-trumpets [KZ]
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California.
Habitat: open, dry areas in sagebrush flats to Ponderosa pine forests.
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.
ssp. nuttallii – Nuttall's linanthus
Leptosiphon septentrionalisnorthern linanthus, northern linanthus [H&C], northern desert-trumpets [KZ]
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.
Lepyrodiclis holosteoidesFalse jagged-chickweed
Leucanthemum maximumShasta daisy
Distribution: Occasionally escaping from cultivation, but usually short-lived.
Habitat: Disturbed sites, meadows, clearings.
Leucanthemum ×superbumShasta daisy
Leucanthemum vulgareoxeye daisy
Distribution: Widely distributed throughout Washington; widely distributed throughout North America.
Habitat: Open, disturbed areas including roadsides, pastures, prairies, grasslands and wastelots.
Leucojum aestivumsummer snowflake
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.
var. columbiana – Columbia lewisia
var. rupicola – Columbia lewisia
Lewisia cotyledonSiskiyou lewisia
Lewisia nevadensisNevada bitterroot
Distribution: Olympic and Cascade Mountains of Washington, south to California.
Habitat: Open, often gravelly, moist to mesic areas at moderate elevations in the mountains to above tree line.
Lewisia pygmaealeast, alpine lewisia, dwarf lewisia
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.
Lewisia rediviva
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia south to California, east to Montana, Wyoming, Utah, and Colorado.
Habitat: Open gravelly and rocky areas from sagebrush plains to moderate elevations in the mountains.
var. rediviva – bitterroot
Lewisia triphyllathree leaf bitterroot, three leaf lewisia
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.
Lewisiopsis tweedyiTweedy's lewisia
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.
Leymus cinereusGreat Basin lyme grass
Distribution: East of the Cascades in Washington; central and western North America.
Habitat: Sagebrush-steppe, arid grasslands, forest edges, and other dry, open areas in the intermountain west.
Leymus flavescenssand lyme grass
Leymus mollis
Distribution: Coastal areas of Washington; Alaska south to California; northern areas of North America.
Habitat: Coastal sand dunes, marshes, headlands.
ssp. mollis – yellow ryegrass
Leymus racemosusmammoth lyme grass
Leymus triticoidesbeardless lyme grass
Leymus ×vancouverensisVancouver wildrye
Ligusticum apiifoliumcelery-leaf wild lovage
Distribution: West of the Cascades, Washington to central California.
Habitat: Thickets, fence rows, sparcely-wooded slopes and prairies.
Ligusticum canbyiCanby's wild lovage
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.
Ligusticum grayiGray's lovage, sheep wild lovage
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.
Ligustrum vulgarecommon privet
Distribution: Occurring west of the Cascades in Washington; British Columbia south to Texas, east to the Atlantic Coast
Habitat: At low elevations in forest understory, forest and prairie edges, and disturbed areas.
Lilaeopsis occidentaliswestern grasswort, western lilaeopsis
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
Lilium columbianumColumbian lily
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.
Limnanthes albawhite meadowfoam
Limnobium laevigatumfrogbit
Distribution: Known from Pacific County in Washington; also known from California and eastern U.S.
Habitat: Lowland ponds, where found floating on water's surface.
Limonium californicumwestern marsh-rosemary
Distribution: Recently (2016) collected in Whatcom county; Oregon south along coast through California to Baja California, Mexico.
Habitat: Coastal salt marshes
Limosella aquaticaawl-leaf mudwort
Distribution: Widespread in the Northern Hemisphere; found throughout the Pacific Northwest.
Habitat: In shallow water or wet mud, in the valleys and plains.
Linanthus pungensprickly phlox
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to Baja California, east to Montana and New Mexico.
Habitat: Dry, open, sandy or rocky places, from the deserts and plains to moderate elevations in the drier mountains.
Linaria dalmaticadalmation toadflax
Distribution: Widely distributed throughout Washington, but more prevalent east of the Cascades crest; widely distributed throughout most of North America except southeastern region.
Habitat: Open areas roadsides, fields, wastelots, forest openings, typically where disturbed.
ssp. dalmatica – brown-leaved toadflax, Dalmatian toadflax, dalmatian toadflax, dalmation toadflax
Linaria grandifloralarge-flowered linaria
Linaria purpureapurple toadflax
Distribution: Introduced as an ornamental, occasionally escaping west of the Cascades in Washington.
Habitat: Bare and disturbed ground.
Linaria vulgarisgreater butter-and-eggs
Distribution: Widely distributed across Washington; widely distributed throughout North America.
Habitat: Noxious weed of roadsides, wastelots, and disturbed areas.
Lindernia dubiafalse pimpernel
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout North America.
Habitat: Disturbed, open soil, often where moist near ponds, lakes, and streams, from low to middle elevations.
Linnaea borealis
Distribution: In the forests and mountains throughout Washington; Alaska south to California, east in North America to the Atlantic Coast.
Habitat: Open to rather dense woods, low to mid-elevations in the mountains.
var. longiflora – American twinflower, longtube twinflower
Linum lewisii
Distribution: Occurring chiefly east of the Cascades crest in Washington; widely distributed throughout much of western North America.
Habitat: Dry, open areas from prairies to alpine ridges.
var. lewisii – wild blue flax
Linum usitatissimumlinseed
Liparis loeseliifen orchid, Loesel's twayblade
Distribution: Occasional, Saskatchewan to Nova Scotia, south to North Dakota and Iowa; Klickitat and Yakima Counties in Washington.
Habitat: Around springs and in bogs.
Lipocarpha aristulatahalfchaff sedge
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.
Lipocarpha micranthasmall-flowered halfchaff edge
Lipocarpha occidentaliswestern halfchaff sedge
Listera banksiananorthwestern twayblade
Distribution: Occurring on both sides of the Cascades in Washington; Alaska to California, east to Alberta and Wyoming.
Habitat: Moist forests and wet meadows, lowlands to subalpine elevations
Listera borealisnorthern twayblade
Distribution: Known only from Okanogan County in Washington; Alaska south to Oregon, east to northern Rocky Mountains, east across Canada to the Atlantic Coast.
Habitat: Moist, rich coniferous forest understory.
Listera convallarioidesbroad-lip twayblade
Distribution: Alaska to California and Arizona, east to Newfoundland to Maine across the northern tier of ststes
Habitat: Moist forests and wet meadows, lowlands to subalpine elevations
Listera cordataheart-leaf twayblade
Distribution: Alaska to Greenland, south to California to North Carolina
Habitat: Usually in damp places and along streams, but occasionally in drier areas
Lithophragma glabrumbulbiferous prairie star, bulbous woodlandstar
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.
Lithophragma parviflorumsmall-flowered prairie star
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.
Lithophragma tenellumslender woodlandstar
Distribution: East side of the Cascades in Washington; British Columbia south to California, east to the Rocky Mountain states.
Habitat: Sagebrush desert and ponderosa pine forests.
Lithospermum ruderalewestern gromwell, Columbian puccoon, western stoneseed
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
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.
var. serotina – alpine lily
Lobelia dortmannawater lobelia
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.
Lobelia kalmiibrook lobelia
Lobularia maritimasweet alison, sweet alyssum
Distribution: Occurring in scattered locations across Washington; British Columbia south to Texas; also occurring throughout central and eastern North America.
Habitat: Escaping from cultivation to roadsides, pastures, and other disturbed areas, often where moist.
Loeflingia squarrosaspreading pygmyleaf
Logfia arvensisfield cottonrose, cudweed, field filago, field cotton rose
Distribution: Occurring east of the Cascades crest in Washington; Alaska to Oregon, east to Sasketchewan, Nebraska, Minnesota and Michigan.
Habitat: Dry, open waste land and overgrazed ranges.
Logfia minimalittle cottonrose, small cudweed
Distribution: Native to northern Europe
Habitat: Heaths, sandy areas
Lolium multiflorumannual ryegrass, Italian ryegrass, perennial ryegrass
Distribution: Introduced and well established in much of temperate North America.
Habitat: Roadsides and waste ground.
Lolium perenneEnglish ryegrass, perennial ryegrass
Distribution: Commonly cultivated as a forage plant; escaped and well established in the Pacific Northwest.
Habitat: Old fields, roadsides, and waste places.
Lomatium ambiguumstreambank desert-parsley, swale desert-parsley, lacy lomatium
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.
Lomatium bicolor
Distribution: Extreme southeast Washington, eastern Oregon and adjacent Idaho, to northeast California.
Habitat: Open slopes, flats, meadows and swales, from the lowlands to moderate elevations in the mountains.
var. leptocarpum – gumbo-lomatium
Lomatium bradshawiiBradshaw's desert-parsley
Distribution: Willamette Valley of Oregon from near Salem to near Eugene.
Habitat: Low, moist ground.
Lomatium brandegeeiBrandegee's desert-parsley
Distribution: Chiefly east of the Cascades in Washington;
Habitat: Open to wooded slopes, moderate to fairly high elevations in the mountains; southern British Columbia south to Washington.
Lomatium canbyichucklusa, Canby's desert-parsley
Distribution: Along Columbia River in NE Washington, common from Kittitas County south into Oregon
Habitat: Scablands and sagebrush steppe in rather deep soil
Lomatium columbianumColumbia Gorge desert-parsley
Distribution: At the east end of the Columbia River Gorge in Washington; Washington south to northern Oregon.
Habitat: Deeper soil in shrub-steppe.
Lomatium couscous, cous-root desert-parsley
Distribution: Southeast Washington and northeast Oregon,east through Idaho to Montana and Wyoming
Habitat: Dry, open, often rocky places often with sagebrush; common at low elevations, occasionally found much higher
Lomatium cuspidatumWenatchee desert-parsley, Wenatchee Mountain lomatium
Distribution: Endemic to the Wenatchee Mountains of Chelan and Kittitas Counties, Washington.
Habitat: Open, rocky slopes, often on serpentine, between 2500-6000 ft.
Lomatium dissectum
Distribution: Widely distributed throughout much of Washington; British Columbia south to California, east to the Rocky Mountains and to the Great Plains of Canada.
Habitat: Common in deeper soil in shrub-steppe; occasional in mountain meadows.
var. dissectum – fern-leaved desert parsley
var. multifidum – fern-leaved desert parsley
Lomatium farinosum
Distribution: Chelan to Yakima Counties, Washington, east to Montana.
Habitat: Rocky slopes and scablands, often on lithosol and with sagebrush.
var. hambleniae – Hamblen's lomatium
Lomatium geyeriGeyer's desert-parsley
Distribution: Chiefly east of the Cascades in Washington; southern British Columbia south to Washington, east to Idaho.
Habitat: Deeper soil in low to mid-elevations of open, dry areas, and under Ponderosa pine.
Lomatium gormaniiGorman's desert-parsley, salt and pepper
Distribution: East of the Cascades in Washington; Washington south to Oregon, east to Idaho.
Habitat: Open slopes and scablands in the foothills, valleys and plains, often with sagebrush.
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.
var. grayi – Gray's lomatium, milfoil lomatium
Lomatium knokei
Distribution: Known only from Kittitas County in Washington.
Habitat: Open, vernally wet, gently sloping meadows of fine-textured clay soils at approximately 1200 meters.
Lomatium laevigatumslickrock desert-parsley, smooth lomatium
Distribution: Along the Columbia River in Klickitat County, Washington, and adjacent Oregon.
Habitat: Crevices is basalt cliffs.
Lomatium lithosolamansHoover's tauschia, Hoover's umbrella-wort
Lomatium macrocarpumlarge-fruit desert-parsley, bigseed lomatium
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.
Lomatium martindalei
Distribution: Distributed on both sides of the Cascades in Washington; British Columbia south to Oregon.
Habitat: Dry mountain meadows, often rocky areas.
var. martindalei – Cascade desert-parsley, coast range lomatium
Lomatium nudicauleIndian-consumption-plant, barestem lomatium, pestle parsnip
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.
Lomatium piperiPiper's lomatium
Distribution: East of the Cascades in Washington; central Washington south to northern California.
Habitat: Sagebrush-bunchgrass steppe up to ponderosa pine forests.
Lomatium quintuplexUmptanum desert-parsley
Distribution: Endemic to eastern Kittitas County and northeastern Yakima County, Washington.
Habitat: Principally lithosol areas in the shrub-steppe.
Lomatium rollinsiiRollins' desert-parsley
Distribution: Canyons of the Snake and lower Salmon Rivers, eastern Oregon and western Idaho.
Habitat: Open slopes.
Lomatium salmoniflorumSalmon River desert-parsley
Distribution: Near the Snake and Clearwater Rivers in Idaho, Latah and Nez Perce Counties, Idaho, and Whitman County west to Palouse Falls, Washington.
Habitat: Open, rocky slopes.
Lomatium serpentinumSnake Canyon desert-parsley
Distribution: Near the Snake River Canyon, western Idaho, eastern Oregon and extreme southeast Washington.
Habitat: Open, often rocky slopes.
Lomatium simplex
Distribution: East of the Cascades in Washington; widely distributed east of the Continental Divide in Montana south to Colorado.
Habitat: Dry, open areas at low elevations.
Lomatium suksdorfiiSuksdorf's desert-parsley
Distribution: Endemic in Klickitat County, Washington
Habitat: Dry, open slopes
Lomatium thompsoniiThompson's desert-parsley
Lomatium triternatum
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Dry to somewhat moist open areas, low to mid-elevations.
var. anomalum – nine-leaf lomatium
Lomatium tuberosumpotato desert-parsley, Hoover's lomatium
Distribution: Scattered locations in Yakima County, Washington, and adjacent counties.
Habitat: Rocky slopes and talus.
Lomatium utriculatumbladder desert-parsley, spring gold, fine-leaved desert parsley
Distribution: West of the Cascades in Washington;British Columbia south to California.
Habitat: Low elevations; somewhat moist, open, often rocky areas.
Lomatium watsoniiWatson's desert-parsley
Distribution: Soluthern Kittitas County, south through Yakima and Klickitat Counties, to northcentral Oregon.
Habitat: Open hillsides, often with sagebrush.
Lonicera cauriana
Distribution: Reported from Washington; Alaska to California, also in Idaho.
Lonicera ciliosaorange honeysuckle
Distribution: Ranging throughout Washington; British Columbia south to Oregon, east to Montana.
Habitat: Open to rather dense woods, low to mid-elevations in the mountains.
Lonicera conjugialispurple-flower honeysuckle
Distribution: Mt. Adams south chiefly through the east side of the Cascades in Washington; south to the Sierra Nevada of California.
Habitat: In woods, meadows and moist open slopes at mid-elevations in the mountains.
Lonicera etruscaEtruscan honeysuckle
Distribution: Occasional west of the Cascades in Washington; established along the Oregon coast and southern British Columbia.
Habitat: Thickets and waste areas.
Lonicera hispidulahairy honeysuckle
Distribution: West of the Cascades in Washington; British Columbia to Oregon.
Habitat: Open woods at low elevations.
Lonicera involucrata
Distribution: Both sides of the Cascades in Washington; Alaska south to California, east to Montana and New Mexico.
Habitat: Common in open woods at low to mid-elevations.
var. involucrata – bearberry, black twin-berry, twinberry
Lonicera japonicaJapanese honeysuckle
Distribution: Occasionally escaped from cultivation in lowland western Washington; California east through the midwestern, southeastern, and northeastern U.S.
Habitat: Disturbed areas, woods, and thickets.
Lonicera tataricaTartarian honeysuckle
Distribution: Scattered localities throughout Washington; throughout much of North America except the southeastern U.S.
Habitat: Disturbed areas, woods, and thickets.
Lonicera utahensisRocky Mountain honeysuckle, Utah honeysuckle
Distribution: Both sides of the Cascades in Washington; British Columbia to Oregon, east to Montana and south in the Rockies to Arizona.
Habitat: Mid- to high elevations in the mountains.
Lotus aboriginusrosy bird's-foot-trefoil
Distribution: West of the Cascades in Washington; Washington south to California.
Habitat: Moist woods and along streams.
Lotus corniculatusgarden bird's-foot-trefoil
Distribution: Occurring on both sides of the Cascades in Washington; widely distributed throughout most of North America.
Habitat: Mesic to wet areas, typically where disturbed.
Lotus crassifolius
Distribution: Chiefly west of the Cascades and towards the south in Washington; south to southern California.
Habitat: Moist woods and along streams, from sea level to moderate elevations in the mountains.
var. crassifolius – big deervetch
Lotus formosissimusseaside bird's-foot-trefoil
Distribution: From southwest Washington south, on the west side of the Cascades and in the Coast Ranges, to Monteray County, California.
Habitat: On moist soil, from near sea level to lower elevations in the mountains.
Lotus pinnatusmeadow bird's-foot-trefoil, meadow deervetch
Distribution: Northwest Washington south to central California, east along rivers to Idaho.
Habitat: Moist soil.
Lotus tenuisnarrow-leaved trefoil
Lotus uliginosusbig lotus, big trefoil, large trefoil
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.
Ludwigia hexapetalafalse loosestrife, water primrose, large-flower primrose-willow
Distribution: Scattered locations throughout Washington; along Columbia River near Portland, OR, introduced in much of North America.
Habitat: Swamps, lakes, and streams.
Ludwigia palustrismarsh primrose-willow
Distribution: West side of the Cascades and along the Columbia River in Washington; widespread in North America, Africa and Eurasia.
Habitat: Marshes and bogs.
Ludwigia peploides
ssp. montevidensis – floating primrose-willow
Luetkea pectinatalutkea, partridgefoot
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.
Luina hypoleucalittleleaf luina, silverback luina, littleleaf silverback
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.
Lunaria annuahonesty, money plant
Distribution: Distributed in scattered locations across Washington; British Columbia south to California and Utah; also distributed throughout eastern North America.
Habitat: Escaping from cultivation to urban forests, roadsides, and other disturbed areas.
Lupinus albicaulissicklekeel lupine
Distribution: Chiefly west of the Cascades in Washington; Washington south to California.
Habitat: Grasslands and prairies from the lowlands to moderate elevations.
Lupinus arboreustree lupine, yellow-bush lupine
Distribution: Occurring in the western Washington lowlands and along the Pacific coast; British Columbia south to California.
Habitat: Sandy soil.
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.
ssp. arbustus – spurred lupine
ssp. calcaratus – spurred lupine
ssp. neolaxiflorus – spurred lupine
ssp. pseudoparviflorus – spurred lupine
ssp. silvicola – spurred lupine
var. montanus – spurred 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.
var. argenteus – silvery lupine
Lupinus bicolorsmall-flower lupine, two-color lupine
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.
Lupinus bingenensis
Distribution: East of the Cascades in Washington; mostly in the Columbia River Gorge in Washington and Oregon.
Habitat: Dry areas at low to moderate elevations in shrub-steppe to montane forest.
var. bingenensis – Bingen lupine
var. dubius – Bingen 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.
var. latifolius – broadleaf lupine
var. subalpinus – broadleaf lupine
var. thompsonianus – Suksdorf's 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.
var. aridus – prairie lupine
var. cusickii – elegant lupine
var. lepidus – Pacific lupine
var. lobbii – elegant lupine
Lupinus leucophyllusvelvet lupine
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.
var. leucophyllus – velvet lupine
var. tenuispicus – velvet lupine
Lupinus littoralisseashore lupine
Distribution: Coastal from British Columbia to California
Habitat: Near the shore along the coast
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.
var. microcarpus – chick lupine
var. scopulorum – chick lupine
Lupinus oreganusOregon lupine
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.
var. kincaidii – Kincaid's lupine, Oregon lupine, sulphur lupine
Lupinus pachylobusbig-pod 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.
var. burkei – large-leaved lupine, many-leaved lupine
var. pallidipes – large-leaved lupine
var. polyphyllus – large-leaved lupine
var. prunophilus – large-leaved 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.
var. intermontanus – low lupine, rusty lupine
Lupinus rivularisriver-bank lupine
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.
Lupinus sabinianusSabin's lupine
Distribution: Blue Mountains of southeast Washington; south to northeast Oregon.
Habitat: Forest openings and grasslands at low to moderate elevations.
Lupinus saxosusrock lupine
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Idaho and Nevada.
Habitat: Shrub-steppe habitat.
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.
var. asotinensis – Asotin silk lupine
var. fikeranus – silky lupine
var. sericeus – silky 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.
var. subsaccatus – Bingen lupine
var. sulphureus – sulphur lupine
Lupinus wyethiiWyeth's lupine
Distribution: Distributed widely throughout Washington, but chiefly east of the Cascades; British Columbia to Oregon, east to Rocky Mountains as far south as Colorado.
Habitat: Open areas from low to moderate elevations, including the subalpine.
Luzula arcuata
Distribution: Alaska, British Columbia, and Mt. Rainier, Washington.
Habitat: Rocky or gravelly soil, usually on moraines or above timberline.
ssp. unalaschcensis – curved woodrush
Luzula campestrisfield woodrush
Luzula comosa
Distribution: Uncommon west of the Cascades, British Columbia to California
Habitat: Gravelly prairies to moist, shaded areas in the lowlands
var. comosa – pale woodrush
var. laxa – Pacific woodrush
Luzula forsteri
ssp. forsteri – southern woodrush
Luzula hitchcockiiHitchcock's woodrush, smooth woodrush
Distribution: Occurring on both sides of the Cascades crest in Washington; southern British Columbia south to Crater Lake and the Wallowa Mountains of Oregon, east to Alberta, Idaho and Montana.
Habitat: Montane forests to alpine slopes, ridges and meadows.
Luzula multifloracommon woodrush
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to Oregon, east to Alberta and western Montana; also in northeastern United States.
Habitat: Fields, meadows, open woods and clearings, at low to moderate elevations in the mountains.
Luzula niveasnowy woodrush
Luzula parviflorasmall flowered woodrush
Distribution: Alaska to Newfoundland, south to southern California and New York.
Habitat: Moist to fairly dry areas, coastal rain forest to alpine slopes.
Luzula piperiPiper's woodrush
Luzula spicata
ssp. spicata – spiked woodrush
Luzula subsessilisshort-stalked wood-rush
Luzula sylvaticagreat woodrush
Lycium barbarummatrimony-vine
Distribution: Chiefly east of the Cascades in Washington; widely distributed throughout North America.
Habitat: Disturbed ground.
Lycium chinenseChinese wolfberry
Lycopodiella inundatabog clubmoss, marsh clubmoss, northern bog clubmoss
Distribution: Occurring west of the Cascades crest in Washington; Alaska south to California; in scattered locations in north central Canada; from Minnesota and Ontarioa east to the Atlantic Coast.
Habitat: Wet areas, pond and lakeshores from low to middle elevations in the mountains.
Lycopodium alpinumalpine clubmoss ground-pine
Distribution: Alaska to northern Washington, east to northern Idaho and northwest Montana.
Habitat: Rocky slopes, dry heath meadows, and open conifer forests at high elevations. In Washington, often found associated with Phyllodoce, Cassiope, and Vaccinium in dry heath soils.
Lycopodium alpinum × Lycopodium sitchensehybrid clubmoss
Distribution: Known from British Columbia south to Oregon and east to Montana, also in Greenland and Newfoundland.
Habitat: Upper montane coniferous forest and brushy areas, and subalpine and alpine meadows. In Washington, has been found in subalpine-alpine heath meadows and on shaded mossy mineral soil below conifers on high montane roadcuts.
Lycopodium annotinuminterrupted clubmoss, stiff clubmoss
Distribution: Alaska to Oregon, east to Montana and south in the Rockies to New Mexico; across Canada and in eastern United States from Maine to Virginia
Habitat: Moist forests, bog edges and rocky areas, lowlands to subalpine
Lycopodium clavatumcommon clubmoss, elk-moss, stag's horn moss, ground pine, running pine
Distribution: Both sides of the Cascades in Washington; British Columbia south to California in western North America; circumboreal.
Habitat: Moist coniferous woods and swamps.
Lycopodium complanatumground cedar, trailing ground-pine
Distribution: Occurring on both sides of the Cascades crest in Washington, primarily in the northern half of the state; Alaska south to Washington, Idaho and Montana, east across Canada and the northern U.S. to the Atlantic Coast.
Habitat: Moist to dry, usually coniferous forests, rocky slopes and sandy openings, low to mid-elevations.
Lycopodium dendroideumprickly tree clubmoss, tree ground-pine
Distribution: Widespread across boreal forests of North America, south to northern Washington, Idaho, Montana, Colorado, and NE U.S. Also found in Asia. In Washington, known from scattered locations in the west Cascades and in Pend Oreille county.
Habitat: Woodlands and open brushy areas. In Washington, found mostly among rock or talus with thick moss or duff layers, often under brush or on edges of forest. At mid elevations in the mountains.
Lycopodium lagopusptarmigan clubmoss, one-cone ground-pine
Lycopodium sitchenseAlaskan clubmoss, Sitka clubmoss
Distribution: Alaska to Oregon, east to Idaho and Montana, and across central Canada to northeastern U.S. and eastern Canada; also in eastern Asia from Japan north.
Habitat: Subalpine-alpine meadows and open rocky areas at mid-to high elevations in the mountains; occasionally in conifer forest or under brush.
Lycopsis arvensisannual bugloss, European bugloss, small bugloss
Lycopus americanuscut-leaf water-horehound
Distribution: Both sides of the Cascades in Washington; throughout most of North America.
Habitat: Nonalkaline wetland, riparian, pond and lakeshore sites at low to moderate elevations.
Lycopus asperrough water-horehound
Distribution: Chiefly east of the Cascades; southern British Columbia to California, east to Colorado and Minnisota.
Habitat: Marshes and shores of streams and lakes; tolerant of alkali.
Lycopus europaeusEuropean water-horehound
Lycopus uniflorusnorthern bugleweed
Distribution: Both sides of the Cascades in Washington; Alaska to Newfoundland, south to northwest California and North Carolina.
Habitat: Stream banks, marshes and peat bogs, mostly in the mountains, but descending to sea level west of the Cascades.
Lygodesmia juncearush skeletonplant
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.
Lysichiton americanusskunk cabbage, yellow skunk cabbage
Distribution: Both sides of the Cascades in Washington; Alaska south to California.
Habitat: Swampy areas from sea level to mid-elevations in the mountains.
Lysimachia ciliatafringed yellow-loosestrife
Distribution: Chiefly east of the Cascades crest in Washington; widely distributed throughout most of North America.
Habitat: Moist woods, prairies, meadows, stream banks, roadsides.
Lysimachia hybridalance-leaved yellow loosestrife, lowland loosestrife, Mississippi loosestrife, lowland yellow-loosestrife
Lysimachia maritimasea milkwort, sea-milkwort
Distribution: Chiefly west of the Cascades in Washington, also in saline areas of the Columbia Basin in eastern Washington; circumboreal, Alaska to California, east to Newfoundland, south in eastern North America to Virginia.
Habitat: Coastal tideflats and saline areas.
Lysimachia minimachaffweed
Distribution: Chiefly east of the Cascades in Washington, though also found along the lower Columbia River west of the Cascades; throughout much of North America.
Habitat: Moist ground and vernal pools at low elevations.
Lysimachia nummulariacreeping-Jenny
Distribution: Scattered locations west of the Cascades in Washington; British Columbia south to California and Nevada; occurring in central U.S and eastern North America.
Habitat: Moist, disturbed ground along lakes, ponds, roadsides and near gardens.
Lysimachia punctatalarge yellow-loosestrife
Distribution: Scattered localities across Washington; British Columbia south Oregon, east to Montana; scattered throughout central and eastern North America.
Habitat: Old fields, roadsides and stream banks.
Lysimachia terrestrisswampcandles
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.
Lysimachia thyrsifloratufted yellow-loosestrife
Distribution: Distributed on both sides of the Cascades in Washington; Alaska south to California, eastern North America.
Habitat: Swamps, lakes and ditches.
Lysimachia vulgarisgarden yellow-loosestrife
Distribution: Occasional in the Puget Trough of western Washington, and at one location in Chelan County; British Columbia, Washington, Montana, Colorado, and widely distributed in eastern North America.
Habitat: Uncommon garden escape of moist areas, lake and pond margins, and riparian zones.
Lythrum hyssopifoliahyssop loosestrife
Distribution: Scattered locations on both sides of the Cascades in Washington; British Columbia south to California; eastern North America.
Habitat: Moist, disturbed areas.
Lythrum portulaspatula-leaf loosestrife
Distribution: Chiefly west of the Cascades in Washington; British Columbia south to California.
Habitat: Wetlands, disturbed moist areas.
Lythrum salicariapurple loosestrife, long purples
Distribution: Widely distributed throughout Washington; widely distributed throughout North America.
Habitat: Noxious weed of standing water and wet ground.