Vascular Plants

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Scientific names beginning with B:
Baccharis pilularis
Distribution: In Washington, known only from Pacific County; Washington south to California.
Habitat: Coastal dunes, bluffs, and thickets.
ssp. consanguinea – chaparral broom
Bacopa rotundifoliadisk water hyssop
Ballota nigra
Distribution: Lowland areas west of the Cascades in Washington; currently only known from Washington.
Habitat: Disturbed ground.
ssp. foetida – black horehound
Balsamorhiza ×bonserihybrid balsamroot
Distribution: Local in eastern Washington where Balsamorhiza rosea is found
Habitat: Dry, rocky slopes at low elevation
Balsamorhiza careyanaCarey's balsamroot
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to central Oregon.
Habitat: Open places, but not on lithosol, in the plains, foothills, and lower mountains.
Balsamorhiza deltoideadeltoid balsamroot, Puget balsamroot
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California.
Habitat: Prairies and other open areas at low elevations, mostly in the Puget Sound trough.
Balsamorhiza hookerihairy balsamroot, hare's head balsamroot, Hooker's balsamroot
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Montana, Idaho and Nevada.
Habitat: Dry, open areas at low to moderate elevations, usually in lithosol (rocky, cobbly soil).
Balsamorhiza incanahoary balsamroot, woolly balsamroot
Distribution: Southeast Washington and northeast Oregon, east through Idaho to Montana and Wyoming
Habitat: Meadows and other moderately moist open places at moderate elevations in the mountains.
Balsamorhiza rosearosy balsamroot
Distribution: Occasional in Eastern Washington
Habitat: Dry, rocky slopes at low elevation
Balsamorhiza sagittataarrowleaf balsamroot
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Shrub-steppe, grasslands, and other open areas at low to moderate elevations.
Balsamorhiza serrataserrrate balsamroot, toothed balsamroot
Distribution: Occurring primarily in south-central and southeastern Washington; Washington south to Oregon.
Habitat: Rock outcrops and dry, rocky knolls.
Balsamorhiza ×terebinthaceawormwood balsamroot
Balsamorhiza ×tomentosawooly hybrid balsamroot
Barbarea orthocerasAmerican wintercress rocket, yellow rocket
Distribution: Widely distributed throughout Washington; Alaska to the mountains of California, east though the Rockies to the New England states.
Habitat: Meadows, stream banks and moist woods, low to mid-elevations in the mountains.
Barbarea vernaBelle Isle cress, landcress, early yellow rocket, scurvygrass, early wintercress
Barbarea vulgarisyellow rocket, bitter wintercress
Distribution: Chiefly west of the Cascades in Washington, with scattered locations east of the Cascades; distributed throughout much of the United States.
Habitat: Garden escape, found chiefly in wet places.
Bassia hyssopifoliabassia, fivehorn smotherweed
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains and Great Plains.
Habitat: Noxious weed of waste areas and irrigated farm land.
Bassia scopariared belvedere, mock cypress, summer cypress
Distribution: Occurring chiefly east of the Cascades in Washington; British Columbia to California, east across U.S. and Canada to the Atlantic Coast.
Habitat: Roadsides, fields, wastelots, and other dry, distrubed, open areas at low to middle elevations.
Beckmannia syzigachneAmerican slough grass
Distribution: Alaska to California, east from the coast to Manitoba and the Great Lakes region
Habitat: Pond margins, marshes and ditches at low elevations
Bellis perennisEnglish daisy, lawn daisy
Distribution: Introduced throughout the United States; chiefly west of the Cascades in Washington and Oregon
Habitat: Lawns and cultivated areas, usually where moist
Berberis aquifoliumholly-leaf Oregon-grape, shining Oregongrape, tall Oregongrape
Distribution: Widely distributed throughout Washington; southern British Columbia south to Northern California, east to northern Idaho and western Montana.
Habitat: Sagebrush slopes and open woods.
Berberis darwiniidarwin's barberry
Distribution: Occasional near the coast in Oregon and California.
Habitat: Prefers high humidity; rarely escapes cultivation
Berberis nervosaCascade Oregon-grape, dull Oregongrape
Distribution: Occurring on both sides of the Cascades crest in Washington; southern British Columbia to California, also in northern Idaho.
Habitat: Open woods, sea level to moderate elevations in the mountains.
Berberis repenscreeping Oregon-grape
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Foothills to open forested slopes.
Berberis thunbergiiJapanese barberry
Distribution: Sparingly introduced in Washington; escaped throughout central and eastern United States and Canada.
Habitat: Disturbed areas
Berberis vulgariscommon barberry, European barberry
Distribution: Introduced as an ornamental, occasionally escaping.
Habitat: Dry, waste ground.
Bergia texanaTexas bergia
Distribution: East of the Cascades in Washington in a few scattered localities; widely distributed across the United States from Washington to California, east to the Gulf Coast states.
Habitat: Emergent in muddy soils of ponds, lakes, ditches, rivers, and streams.
Berteroa incanahoary alyssum
Distribution: In scattered locations east of the Cascades in Washington; widely distributed throughout much of North America.
Habitat: Uncommon in dry, waste places in most of the Pacific Northwest; common in northeast Washington.
Berula erecta
Distribution: East of the Cascades in Washington; British Columbia south to California, east to the Mississippi River.
Habitat: Wet areas, often in water, in valleys and plains.
var. incisa – stalky berula, cut-leaf-water-parsnip
Besseya rubrared coraldrops
Distribution: Occurring east of the Cascades crest in Washington; Washington south to Oregon, east to Idaho and Montana.
Habitat: Open slopes and dry meadows in the foothills and lowlands.
Betula glandulosadwarf birch, resin birch, swamp birch
Distribution: Alaska south to the Sierra of California, east to Nevada and Colorado, and also to Newfoundland and New York.
Habitat: Stream banks, margins of marshes, lakes and bogs, and on alpine slopes.
Betula occidentalisred birch, river birch, water birch
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska south to California, east in Canada to Ontario, east in the U.S. to the Rocky Mountains and northern Great Plains.
Habitat: Moist areas, streambanks at low elevations.
Betula papyriferacanoe birch, paper birch, western paper birch, white birch
Distribution: Alaska to Oregon, east of the Cascades except in northwest Washington, east to the Atlantic coast
Habitat: Moist, open to dense woods, low to moderate elevations
Betula pendulaEuropean weeping birch
Distribution: Occurring in Washington on both sides of the Cascades; Introduced as an ornamental in Washington; occurring in isolated locations in south-central Canada and the eastern U.S.
Habitat: Disturbed areas associated with urban and suburban development where the trees escape from cultivation.
Betula pumilabog birch, dwarf birch, swamp birch
Bidens amplissimaVancouver Island beggar ticks
Distribution: Vancouver Island, British Columbia, and Snohomish County, Washington.
Habitat: Wet places.
Bidens beckiiBeck's water marigold
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to Oregon, east across northern U.S. and Canada to the Atlantic Coast.
Habitat: Lowland ponds and lakes.
Bidens cernuabur marigold, nodding beggar ticks
Distribution: Widely distributed throughout much of Washington; widely distributed throughout North America.
Habitat: Stream banks, pond and lake edges, and other wet places at low elevations.
Bidens connataswamp beggar ticks
Bidens frondosaleafy beggarticks, devil's pitchfork, sticktight
Distribution: Widely distributed throughout much of Washington; widely distributed throughout North America except Alaska and northernmost Canada.
Habitat: Wet areas at low elevations.
Bidens tripartitathree lobed beggarticks
Distribution: Introduced in most of the United States, but uncommon in our area.
Habitat: Wet waste places, primarily at low elevtions.
Bidens vulgatatall beggarticks, western sticktight
Distribution: Distributed widely throughout Washington; British Columbia east to Nova Scotia, and southward throughout much of the U.S.
Habitat: Streamsides, ponds, lakes, ditches and other moist to wet waste places.
Bistorta bistortoidesAmerican bistort, western bistort
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia south to California, east to Alberta and New Mexico.
Habitat: Streambanks and moist or swampy meadows, mid-elevations in the mountains to alpine slopes.
Bistorta viviparaalpine bistort, serpent-grass
Distribution: Occurring on both sides of the Cascades in northern Washington; Alaska south to Oregon, east to Montana, and south in the Rockies to New Mexico; across Canada to Newfoundland, south to Minnesota and Maine.
Habitat: Damp areas, shady woods, meadows and streambanks at mid- to high elevations in the mountains.
Blechnum spicantdeer fern
Distribution: British Columbia to California, chiefly west of the Cascades, occasionally to northern Idaho
Habitat: Wet areas in shade, sea level to mid-elevations
Blepharipappus scaberblepharipappus, rough eyelashweed
Distribution: Occurring in southeastern Washington; adjacent Idaho, south through eastern Oregon to California and northwest Nevada.
Habitat: Bunchgrass prairies and grassy foothills.
Boechera atrorubensblack-flowered rockcress
Distribution: East of the Cascades crest in Washington; Washington south to Oregon.
Habitat: Sagebrush and ponderosa pine country.
Boechera calderiCalder's rockcress
Boechera cascadensisCascades rockcress
Boechera cusickiiCusick's rockcress
Distribution: East of the Cascades in Washington; east-central Washington south to Nevada, east to central Idaho.
Habitat: Sagebrush flats to open Ponderosa pine forests, often on lithosol.
Boechera divaricarpaspreadingpod rockcress
Distribution: Occurring on both sides of the Cascades crest in Washington, and in the Olympic Mountains; Alaska south to California, east to the Rocky Mountains.
Habitat: From middle elevations to subalpine areas in the mountains.
Boechera grahamiiGraham's rockcress
Boechera lemmoniiLemmon's rockcress
Distribution: Occurring in the Olympic Mountains and East Cascades in Washington; Alaska south to California, east to the Rocky Mountains.
Habitat: Alpine meadows, ridges and talus slopes.
Boechera lyalliiLyall's rockcress, murry's rockcress
Distribution: Widely distributed in the mountains throughout Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Subalpine to alpine ridges, cliffs, and drier meadows.
Boechera microphyllalittleleaf rockcress, small-leaved rockcress
Distribution: Occurring in Washington east of the Cacades crest; British Columbia south to eastern Oregon, east to Montana and Wyoming.
Habitat: Low montane to subalpine.
Boechera paddoensisMt. Adams rockcress
Distribution: Occurring east of the Cascades crest in the Mt. Adams area; Washington south to northeastern Oregon.
Habitat: Alpine slopes and talus.
Boechera paucifloraColumbia rockcress, few-flowered rockcress, pine rockcress, small-flowered rockcress
Distribution: East of the Cascades crest in Washington; British Columbia south to California, east to Montana and Utah.
Habitat: Sagebrush and ponderosa pine country.
Boechera pendulocarpadanglepod rockcress
Distribution: Chiefly east of the Cascades crest in Washington; Yukon Territory south to California, east to Montana, Wyoming, and Utah.
Habitat: From sagebrush and ponderosa pine slopes to well up in the mountains.
Boechera puberulaBlue Mountain rockcress, hoary rockcress
Boechera retrofracta
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains, and east across Canada to Ontario.
Habitat: Sagebrush-steppe to forest openings at middle elevations.
Boechera sparsifloraelegant rockcress, slender rockcress
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to Idaho, Nevada, and Utah.
Habitat: From sagebrush plains to forest openings and meadows at moderate elevations.
Boechera strictaCanadian rockcress, Drummond's rockcress
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains, and east along the northern U.S. and southern Canada to the Atlantic Coast.
Habitat: Open areas in the forest at mid-elevations to sub-alpine meadows.
Boechera suffrutescenswoody rockcress
Bolandra oregananorthern false coolwort
Distribution: Along the Columbia River Gorge and in southeastern Washington; Washington south to Oregon along the lower Columbia River Gorge, and along the Snake River and its tributaries in Oregon and Idaho.
Habitat: Moist, mossy rocks, usually near waterfalls.
Bolboschoenus fluviatilisriver bulrush
Bolboschoenus maritimus
Distribution: Widespread in the Northern Hemisphere; more common along the sea coasts.
Habitat: Marshes, wet meadows, and margins of ponds, especially in alkaline or saline areas.
ssp. paludosus – saltmarsh bulrush, seacoast bulrush
Boltonia asteroides
var. recognita – asterlike boltonia, white doll's-daisy
Borago officinalisborage, common borage
Distribution: Introduced at scattered locations in the United States; occasional west of the Cascades in the Pacific Northwest.
Habitat: Waste ground and disturbed soil.
Botrychium ascendensupswept moonwort
Botrychium crenulatumdainty moonwort, scalloped moonwort
Distribution: East Cascades in northern Washington; British Columbia to California, east to Montana and Arizona
Habitat: Mesic meadows, fen margins, and streamsides under Thuja plicata, at montane elevations.
Botrychium hesperiumwestern moonwort
Botrychium lanceolatumlance-leaved grapefern, red triangle moonwort
Distribution: Circumboreal, extending south to southern Washington and Pennsylvania
Habitat: Moist or wet places in the mountains, occasionally to high elevations
Botrychium linearenarrow-leaf grapefern, slender moonwort
Botrychium lunariacommon moonwort
Botrychium michiganenseMichigan moonwort
Distribution: Scattered in Western North America and eastward to the Great Lakes; in Washington known from the northeast corner of the state.
Habitat: Mesic montane meadows.
Botrychium minganenseMingan moonwort
Distribution: Alaska to California, east to Colorado and to Maine across the northern tier of states
Botrychium montanumwestern goblin, mountain moonwort
Distribution: British Columbia to California, east to Montana
Botrychium paradoxumparadox moonwort, two-spiked moonwort
Botrychium pedunculosumstalked moonwort
Botrychium pinnatumnorthwestern moonwort, St. John's moonwort
Distribution: Alaska to Washington and the Wallowa Mountains of Oregon
Habitat: Moist or wet, mostly open places at fairly high elevations in the mountains
Botrychium simplex
var. simplex – little grapefern, least moonwort
Botrychium virginianumrattlesnake fern, common grapefern, Virginia grapefern
Distribution: Throughout the United States and Canada; chiefly in southern British Columbia and northern Idaho in the Pacific Northwest
Habitat: Moist woods and thickets, seldom in meadows, valleys to mid-elevations in the mountains
Bouteloua curtipendula
Distribution: Montana east to Maine, south to most of the United States, barely reaching the Pacific Northwest
Habitat: Plains to lower mountains, often on scablands or rocky slopes.
Boykinia intermediagreater boykinia, Sierran brookfoam
Distribution: Occurring on the Olympic Peninsula in Washington; Washington south along the coast to central Oregon.
Habitat: Moist woods, meadows, streambanks, roadside ditches.
Boykinia occidentaliscoastal brookfoam
Distribution: West of the Cascades crest in Washington; British Columbia south to California.
Habitat: Moist woods and along streams, lowlands and along the coast.
Brachypodium sylvaticumfalse brome
Distribution: Currently known from Cowlitz county in Washington; British Columbia south to California; also in Virginia.
Habitat: Roadsides and other disturbed, open areas at low elevations.
Brasenia schreberiwatershield
Distribution: Occurring chiefly west of the Cascades in Washington; Alaska to California, east to much of Canada and eastern United States.
Habitat: Shallow ponds and sluggish streams.
Brassica junceaChinese, Indian, brown mustard, leaf mustard
Distribution: Occurring in scattered locations throughout Washington; widely distributed throughout North America.
Habitat: Disturbed areas including fields, roadsides and wastelots.
Brassica napusrape, winter rape, rapeseed
Distribution: Known from only a few scattered locations in Washington; widely distributed throughout much of North America.
Habitat: Disturbed areas including fields, roadsides, and wastelots, where often escaped from cultivation.
Brassica nigrablack mustard
Distribution: Occurring in scattered locations throughout Washington; widely distributed throughout much of North America.
Habitat: Distrubed areas such as roadsides, fields, and waste lots.
Brassica oleraceacabbage, wild cabbage
Distribution: Known only from San Juan County in Washington; Washington and California; more commonly found in northeastern North America.
Habitat: Disturbed areas including fields, roadsides, and wastelots, where escaped from cultivation.
Brassica rapacommon mustard, field mustard, wild turnip
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout North America.
Habitat: Distrubed areas such as roadsides, fields, and waste lots.
Brickellia grandifloratasselflower brickellbush, large flowered tasselflower, large flowered thoroughwort
Distribution: Occasional east of the Cascades in Washington and Oregon.
Habitat: Openings in woods at moderate elevations, sometimes in plains.
Brickellia microphylla
var. microphylla – small leaved brickellia
Brickellia oblongifolia
Distribution: East of the Cascade summits, southern British Columbia and Montana, south to California and New Mexico.
Habitat: Dry, often rocky places in the foothills and lowlands.
var. oblongifolia – narrowleaf brickellia
Briza maximabig quakinggrass
Briza minorlittle quaking grass
Distribution: Well established in Eastern North America; occasional on the West coast.
Habitat: Dry waste areas.
Brodiaea coronariabluedick brodiaea, harvest brodiaea
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia south to California.
Habitat: Grasslands, balds, prairies, and open hillsides at low to middle elevations.
Brodiaea rosea
ssp. rosea – Indian Valley brodiaea
Bromus aleutensisAleut brome
Bromus arenariusAustralian brome
Bromus briziformisrattlesnake brome
Distribution: Southern British Columbia south to California, east to Idaho and Montana; occasional in eastern United States.
Habitat: Waste ground, roadsides, and overgrazed areas.
Bromus carinatus
Distribution: British Columbia south to Mexico, east to Rocky Mountains.
Habitat: Grasslands, meadows, and forest openings from sea level to subalpine.
var. carinatus – California brome
var. marginatus – large mountain brome
Bromus catharticus
var. elatus – rescue grass
Bromus ciliatusfringed brome
Bromus commutatusmeadow brome
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout North America.
Habitat: Waste ground, meadows, roadsides.
Bromus diandrusgreat brome, ripgut brome, ripgut grass
Distribution: Introduced from British Columbia to Baja California, mostly west of the Cascades in Washington, but east to Idaho and Colorado.
Habitat: A weed of waste ground and along highways and railroads.
Bromus erectusupright brome
Bromus hordeaceus
Distribution: Common introduction from Alaska south to Baja California, east to Idaho and Montana.
Habitat: Waste ground, roadsides, dry hillsides.
ssp. hordeaceus – soft chess
Bromus inermissmooth brome
Distribution: Alaska to California, east to Labrador and Vermont.
Habitat: Commonly used in hayfields and pastures; disturbed areas, old fields, meadows and streambanks from the lowlands to subalpine slopes.
Bromus japonicusJapanese brome
Distribution: East of the Cascades, southern British Columbia to California, east across Canada and most of eastern United States.
Habitat: Sagebrush desert and grasslands to lower mountain forests; often a weed of roadsides and waste land.
Bromus madritensiscompact brome
Bromus orcuttianuschinook brome
Bromus pacificusPacific brome
Distribution: West of the Cascades crest in Washington; Alaska south to Oregon.
Habitat: Meadows and forest openingsat low elevations, often near or along the coast.
Bromus pumpellianus
Distribution: Occurring east of the Cascades crest in Washington; Alaska to Oregon, east to Rocky Mountains.
Habitat: Stream banks, lake shores, sand dunes, meadows, grassy slopes, and roadsides
ssp. pumpellianus – Arctic brome, pumpelly brome
Bromus racemosusbald brome
Bromus rubensfox-tail brome
Distribution: Chiefly east of the Cascades in Washington; central Washington south to California, east to Idaho, Utah and Arizona.
Habitat: Common weed on overgrazed land, waste areas.
Bromus secalinusrye brome
Distribution: Occurring on both sides of the Cascades in Washington; widely distributed throughout North America.
Habitat: Disturbed, open ground.
Bromus sitchensisAlaska brome
Distribution: Along or near the coast from Alaska south to northwest Oregon.
Habitat: Meadowland to subalpine streambanks and talus slopes.
Bromus squarrosus
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to Oregon, east in scattered locations to the Atlantic Coast.
Habitat: Open, disturbed areas including fields, meadows, and forest openings.
var. squarrosus – corn brome
Bromus sterilispoverty brome
Distribution: Southern British Columbia south to California, and in the Rocky Mountains and eastern United States.
Habitat: Roadsides and waste places.
Bromus suksdorfiiSuksdorf's brome
Bromus tectorumcheat grass
Distribution: Chiefly east of the Cascades,Alaska south to Baja California, east to Maine and Texas.
Habitat: Waste or disturbed areas, especially common on overgrazed land.
Bromus vulgarisColumbian brome
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south along the coast to northern California, east to Alberta, Montana and Wyoming.
Habitat: Shaded to open woods or moist to dry banks, from near sea level to mountain meadows and dry, rocky slopes at 6000' elevation.
Bryonia albawhite bryony
Distribution: Occurring in eastern and southeastern Washington; east to Montana, south to Utah.
Habitat: Disturbed areas where escaped from cultivation.
Buddleja davidiiorange-eye butterfly-bush
Distribution: Introduced in western Washington; British Columbia south to California, and eastern United States.
Habitat: Escaped ornamental; roadsides and waste ground
Buglossoides arvensiscorn gromwell, field gromwell
Butomus umbellatusflowering rush
Distribution: Whatcom County in Washington. Introduced across the northern United States from Washington to Vermont.
Habitat: Occasional in ponds and wetlands.