Vascular Plants

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


Browse by scientific name:

A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z
Scientific names beginning with M:
Maclura pomiferaosage-orange
Distribution: Introduced and established in the Snake River Canyon in Asotin County, Washington; Washington south to California, and widely established in central and eastern U.S. and Ontario, Canada.
Habitat: Open, disturbed areas.
Origin: Introduced from elsewhere in United States
Flowers: May-June
Madia citriodoralemon scented tarplant, lemon scented tarweed, lemon tarweed
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Nevada.
Habitat: Dry, open hillsides and foothills.
Origin: Native
Flowers: May-June
Madia eleganscommon madia, autumn showy tarweed
Distribution: Southwest Washington, south through western Oregon to California.
Habitat: Dry, open places, often becoming a roadside weed.
Origin: Native
Flowers: July - September
Madia exiguathreadstem madia, little tarplant, little tarweed
Distribution: Chiefly east of the Cascades, southern British Columbia to California, east to northwest Montana and Nevada.
Habitat: Dry, open woods and grasslands, from the plains and foothills, occasionally up to moderate elevations in the mountains.
Origin: Native
Flowers: May - July
Madia glomeratamountain tarplant, cluster tarweed, mountain tarweed
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to south to California, east to the Rocky Mountains and across northern U.S. and southern Canada to the Atlantic Coast.
Habitat: Common in dry, open places from the foothills to mid-elevations in the mountains.
Origin: Native
Flowers: July-September
Madia gracilisgrassy tarplant, common tarweed, slender tarweed
Distribution: Widely distributed throughout Washington; British Columbia south to California, east to Montana, Idaho, Nevada, and Utah.
Habitat: Dry, open areas from shrub-steppe to mid-elevations in the mountains.
Origin: Native
Flowers: June-August
Madia sativaChilean tarplant, coast tarweed
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California.
Habitat: Dry, open places at low elevations, often along roadsides or other disturbed sites.
Origin: Native
Flowers: June-September
Mahonia 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.
Origin: Native
Flowers: March-May
Mahonia 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.
Origin: Native
Flowers: March-June
Mahonia 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.
Origin: Native
Flowers: April-June
Maianthemum dilatatumwild lily-of-the-valley, may-lily, two-leaf false Solomon's-seal
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
Maianthemum racemosumlarge false Solomon's seal, Solomon-plume, false spikenard
Distribution: Widely distributed throughout Washington; widely distributed throughout much of North America south of Yukon Territory, Northwest Territory, and Quebec.
Habitat: Moist woods and open forests, sea level to mid-elevations in the mountains.
Origin: Native
Flowers: April-July
ssp. amplexicaule – plumed Solomon's seal, plumed spikenard
Maianthemum stellatumstar-flowered Solomon's-seal
Distribution: Widely distributed throughout Washington; widely distributed throughout much of North America.
Habitat: Moist woods and streambanks to open, rocky hillsides.
Origin: Native
Flowers: May-July
Malaxis monophylloswhite adder's-mouth, one-leaved malaxis
Origin: Native
var. brachypoda – North American white adder's-mouth
Malus baccataSiberian crabapple
Origin: Introduced
Malus ×dawsonianaDawson apple
Distribution: Occurring west of the Cascades crest in Washington; Washington south to Oregon.
Habitat: Fields, roadsides, wastelots, and abandoned homesteads.
Origin: Introduced
Flowers: April-May
Malus fuscaOregon crabapple, western crabapple
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska south to California.
Habitat: Moist woods, swamps and open canyons from sea level to moderate elevations in the mountains.
Origin: Native
Flowers: April-May
Malus hupehensisflowering tea crabapple
Origin: Introduced
Malus prunifoliapearleaf crabapple, plumleaf crabapple
Origin: Introduced
Malus pumilaapple, cultivated apple
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout much of North America.
Habitat: Forested edges and openings, fields, roadsides, abandoned homesteads, and other disturbed areas.
Origin: Introduced
Flowers: April-June
Malus toringoJapanese crabapple, Siebold crabapple, toringo
Origin: Introduced
Malva moschatamusk mallow
Distribution: Occurring west of the Cascades in Washington; Washington south to California, east to Wyoming, and Tennesee to Maine in eastern United states.
Habitat: Garden plant occasionally escaping in disturbed areas.
Origin: Introduced from Europe
Flowers: May-July
Malva neglectadwarf mallow
Distribution: Widely distributed throughout Washington on both sides of the Cascades; widely distributed throughout North America.
Habitat: Common weed of roadsides, waste areas, gardens, and disturbed sites.
Origin: Introduced
Flowers: May-September
Malva parvifloracheeseweed, alkali mallow, small-whorl mallow
Distribution: Scattered locations in Washington; widely distributed throughout much of North America.
Habitat: Waste places, disturbed areas.
Origin: Introduced from Eurpoe
Flowers: March-August
Malva pusillalow mallow
Origin: Introduced
Malva sylvestriscommon mallow, high mallow
Distribution: Scattered locations on both sides of the Cascades in Washington; widely distributed throughout North America.
Habitat: Waste places and disturbed soil.
Origin: Introduced
Flowers: May-September
Malva verticillata
Origin: Introduced
Malvella leprosaalkali-mallow
Origin: Native
Flowers: June - September
Marah oreganacoastal manroot
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California.
Habitat: Low elevation fields, thickets and open areas.
Origin: Native
Flowers: April-June
Marrubium vulgarewhite horehound
Distribution: Both sides of the Cascades in Washington; introduced in most of the United States.
Habitat: Weed of disturbed sites
Origin: Introduced from Eurasia
Flowers: June-October
Marsilea muticaAustralian waterclover
Distribution: Known from Snohomish and Pacific counties in Washington; southeastern U.S.
Habitat: Lowland ponds in water to 1 meter deep.
Origin: Introduced
Marsilea oligosporaNelson's pepperwort, Pacific clover-fern water-clover
Origin: Native
Marsilea vestitahairy clover-fern, pepperwort, water-clover pepperwort
Distribution: Both sides of the Cascades in Washington; British Columbia south to California, east to Minnesota and Louisiana.
Habitat: Ponds, vernal pools, floodplains.
Origin: Native
Spores: Spores produced April-October
Matricaria chamomillawild chamomile, scented mayweed
Distribution: Widespread across the United States and southern Canada.
Habitat: Roadsides, dry waste sites.
Origin: Introduced
Flowers: Late April - June
Matricaria discoideapineapple weed
Distribution: Widely distributed throughout Washington; widely distributed throughout much of North America.
Habitat: Disturbed areas, moist to dry.
Origin: Native
Flowers: May-September
Matthiola incana
Origin: Introduced
Matthiola longipetala
Origin: Introduced
Mauranthemum paludosumannual marguerite
Origin: Introduced
Mazus pumilusJapanese mazus
Distribution: Introduced in eastern United States and in scattered locations in southwest Washington and adjacent Oregon.
Habitat: Lawns and wet bottom lands.
Origin: Introduced from Asia
Flowers: May - November
Meconella oreganawhite fairy-poppy
Distribution: West of the Cascades, Victoria, British Columbia south to California; rare in Washington, more common in the Willamette Valley of Oregon.
Habitat: Open ground and prairies where wet in the spring.
Origin: Native
Flowers: March - April
Medicago arabicaspotted medic
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia south to California, east to Montana; also in the central, southern, and northeastern U.S.
Habitat: Disturbed areas including wastelots, roadsides and fields.
Origin: Introduced
Flowers: April-July
Medicago lupulinahop clover, black medic
Distribution: Widely distributed throughout Washington; widely distributed throughout much of North America.
Habitat: Waste places and sandy or gravelly soil.
Origin: Introduced
Flowers: April-August
Medicago minimaburr medick
Distribution: Sparingly introduced in the Pacific Coast states, and some states in the southern and eastern United States
Habitat: Escaped from cultivation
Origin: Introduced
Flowers: March - June
Medicago polymorphatoothed medick
Distribution: Introduced from Europe and found almost throughout the United States; escecially abundant west of the Cascades and Sierra Nevada.
Habitat: Waste ground and disturbed areas, mostly at low elevations.
Origin: Introduced
Flowers: March - June
Medicago sativaalfalfa, lucerne
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
Melampyrum linearenarrow-leaved cow wheat
Distribution: Occurring in the northeastern corner of Washington; British Columbia south to Washington, east across the northern half of North America to the Atlantic Coast.
Habitat: Forest openings, rocky outcroppings, and wet areas from low to moderate elevations.
Origin: Native
Flowers: July-August
Melica aristatabearded melic grass
Origin: Native
Flowers: June - July
Melica bulbosaonion grass
Origin: Native
Flowers: May - July
Melica ciliatasilky melic
Origin: Introduced
Melica fugaxsmall melic grass
Origin: Native
Flowers: May - Early July
Melica harfordiiHarford's melic grass
Origin: Native
Flowers: Late May - July
Melica smithiiSmith's melic grass
Distribution: Slouthern British Columbia south to Oregon, east to Alberta and Wyoming.
Habitat: Moist woods.
Origin: Native
Flowers: June - August
Melica spectabilisshowy melic grass
Distribution: Southern British Columbia south to northern California chiefly east of the Caascade crest, east to Montana and Colorado.
Habitat: Usually in moist, loamy soil in meadows and open parks in mountain forests, but also dry to wet meadowlands and open forests to subalpine ridges.
Origin: Native
Flowers: Late May - July
Melica subulataAlaska oniongrass
Distribution: Southern Alaska south to California, east to Montana and Wyoming.
Habitat: Open slopes to thick, dry or moist woods, from near sea level to mid-elevations in the mountains.
Origin: Native
Flowers: May - July
Melilotus albuswhite sweet-clover
Distribution: Widely distributed across Washington; widely distributed as a weed over most of the United States and southern Canada.
Habitat: Roadsides, waste ground, disturbed soil.
Origin: Introduced
Flowers: May-October
Melilotus indicussmall flowered yellow sweet clover, Indian sweet-clover
Distribution: Sparingly introduced in western Washington and Oregon, more common in California.
Habitat: Waste ground, disturbed soil.
Origin: Introduced
Flowers: May - July
Melilotus officinalisyellow sweet-clover
Distribution: Widely distributed throughout Washington; introduced throughout the United States
Habitat: Widespread weed of roadsides and waste ground.
Origin: Introduced
Flowers: May-September
Melissa officinalislemonbalm
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
Mentha aquaticabergamot mint, water mint
Distribution: West of the Cascades in Washington; British Columbia south to California; central and eastern North America.
Habitat: Lake and pond shores, riparian areas, and wetlands.
Origin: Introduced
Flowers: June-September.
Mentha canadensis
Distribution: Widely distributed on both sides of the Cascades in Washington; Alaska to California, east across Canada and most of the United States.
Habitat: Common in lake and pond shore margins, riparian and wetland areas at low elevations.
Origin: Native
Flowers: July-September
Mentha ×piperitapeppermint
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout in North America.
Habitat: Banks of streams and ditches, bottom lands and moist roadsides.
Origin: Introduced
Flowers: July-September
Mentha pulegiumpennyroyal
Distribution: Southern and southwestern Washington along the Columbia River; British Columbia south to California; scattered in eastern North America.
Habitat: Moist, disturbed areas.
Origin: Introduced from Europe
Flowers: July-October
Mentha spicataspearmint
Distribution: Both sides of the Cascades in Washington; widespread throughout all of North America.
Habitat: Banks of streams and ditches and other damp places.
Origin: Introduced
Flowers: June-August
Mentha suaveolensapple mint
Distribution: Chiefly west of the Cascades in Washington; Washington to California and Arizona
Habitat: Roadsides, wasteland, and other disturbed sites.
Origin: Introduced
Flowers: July-September
Mentha ×villosafoxtail mint
Origin: Introduced
Mentzelia albicauliswhite-stem blazingstar
Distribution: Mostly east of the Cascades in Washington; British Columbia to California, east to Montana and New Mexico.
Habitat: Dry, usually sandy soil in the shrub-steppe to the foothills.
Origin: Native
Flowers: May-July
Mentzelia dispersabushy blazing star
Distribution: East of the Cascades in Washington; Washington south to southern California, east to Montana and Colorado.
Habitat: Dry soil, from the plains into the canyons and slopes of the lower mountains.
Origin: Native
Flowers: May-July
Mentzelia laevicaulisgiant blazing-star
Distribution: Chiefly east of the Cascades in Washington; British Columbia south to California, east to Montana and Colorado.
Habitat: Dry, often rocky or gravelly soil, desert valleys to lower mountains.
Origin: Native
Flowers: July-September
var. laevicaulis – blazing star mentzelia, common blazing star
var. parviflora – blazing star mentzelia, common blazing star
Mentzelia montanamountain blazing-star
Origin: Native
Menyanthes trifoliatabuck-bean
Distribution: Widely distributed throughout Washington on both sides of the Cascades; Alaska south to California, east across Canada and the northern half of the United States.
Habitat: Bogs, marshes and ponds, low to mid-elevations in the mountains
Origin: Native
Flowers: May-August
Mercurialis annuaannual mercury
Origin: Introduced
Mertensia brachycalyxshort-sepaled bluebells
Origin: Native
Mertensia ciliatastreamside bluebells
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to the Rocky Mountains.
Habitat: Stream banks, wet meadows, damp thickets, and wet cliffs, from the foothills to high elevations in the mountains.
Origin: Native
Flowers: June-August
Mertensia longifloratrumpet bluebells, long-flowered lungwort
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
Mertensia oblongifolialanguid lady, leafy lungwort
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
Mertensia paniculatapaniculate bluebells, tall bluebells
Distribution: Alaska to Oregon, east to Montana; also in the Great Lakes region
Habitat: Streambanks and wet meadows at mid-elevations in the mountains
Origin: Native
Flowers: May - August
var. borealis – tall lungwort
var. paniculata – panicled lungwort
Mertensia platyphyllabroadleaved bluebells, western bluebells
Distribution: Occurring from the west base of the Cascades Mountains to the coast in Washington; Washington south to Oregon.
Habitat: Stream banks and moist, low woods at lower elevations.
Origin: Native
Flowers: May-July
Mertensia umbratilisshade bluebells, shade lungwort
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
Mespilus germanica
Origin: Introduced
Micranthes apetalaTiny swamp saxifrage, western swamp saxifrage
Distribution: East of the Cascades crest in Washington; Washington south to Oregon, east to Idaho and Montana.
Habitat: Vernally moist meadows at low to moderate elevations.
Origin: Native
Flowers: March-May
Micranthes ferruginearusty saxifrage
Distribution: In the Olympics and Cascades mountains in Washington; Alaska to south California, east to Idaho, Montana, and Wyoming.
Habitat: Open, moist, often rocky areas, low to mid-elevations in the mountains.
Origin: Native
Flowers: June-August
Micranthes fragosaClayton's saxifrage
Distribution: East of Cascades in Washington, south to Oregon and east to Idaho.
Habitat: Wet slopes and cliffs, often near watercourses.
Origin: Native
Flowers: April-June
Micranthes gormaniiGorman's saxifrage
Origin: Native
Micranthes idahoensisIdaho saxifrage
Distribution: Washington and Oregon, east to Montana and Idaho.
Habitat: Exposed areas, ledges, and open slopes.
Origin: Native
Flowers: April-July
Micranthes integrifoliaColumbian saxifrage, swamp saxifrage, Whole-leaf saxifrage
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia south to California.
Habitat: Prairies, grassy slopes and vernally moist areas, sea level to subalpine.
Origin: Native
Flowers: March-July
Micranthes lyalliiLyall's saxifrage, red-stemmed saxifrage
Distribution: On both sides of the Cascades in Washington; Alaska south to the north Cascades of Washington, east to western Alberta, and south in the Rocky Mountains to Montana and Idaho.
Habitat: Wet, gravelly meadows and along streams and ponds at high elevations.
Origin: Native
Flowers: July-September
Micranthes nelsonianadotted saxifrage, Nelson's saxifrage
Distribution: Both sides of the Cascades in Washington; British Columbia to Oregon.
Habitat: Montane wet areas and streambanks from low to medium elevations.
Origin: Native
Flowers: May-July
var. cascadensis – dotted saxifrage, Nelson's saxifrage
Micranthes nidificaColumbia saxifrage, swamp saxifrage
Distribution: East of the crest of the Cascades, British Columbia south to northeast California, east to Idaho and Nevada.
Habitat: Prairies and wet banks to subalpine meadows.
Origin: Native
Flowers: April - July
Micranthes occidentalismountain saxifrage, redwool saxifrage, western saxifrage
Distribution: Both sides of the Cascades in Washington; Alaska south to Oregon and Nevada, east to Saskatachewan and south to New Mexico.
Habitat: Dry to wet open areas, rock crevices, meadows, and streambanks from moderate to high elevations in the mountains.
Origin: Native
Flowers: May-August
Micranthes odontolomabrook saxifrage, streambank saxifrage
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Streambanks, lake shores and wet meadows from the lower mountains to the alpine.
Origin: Native
Flowers: June-September
Micranthes oreganabog saxifrage, Oregon saxifrage
Distribution: Both sides of the Cascades crest in Washington; Washington south to California, east to Alberta, Montana, Idaho, Nevada, and Colorado.
Habitat: Bogs, streambanks and wet meadows at mid-elevations in the mountains.
Origin: Native
Flowers: April-July
Micranthes rufidularusty-hair saxifrage
Distribution: Both sides of the Cascades in Washington; British Columbia south to California.
Habitat: Wet open areas, ledges, rock outcroppings from moderate to high elevations in the mountains.
Origin: Native
Flowers: May-August
Micranthes tischiiOlympic saxifrage
Distribution: Olympic Peninsula endemic
Habitat: Forested ledges and rock crevices where moist.
Origin: Native
Flowers: May-July
Micranthes tolmieialpine saxifrage, Tolmie's alpine saxifrage, Tolmie's saxifrage
Distribution: Occurring in the Olympic and Cascade mountains in Washington; Alaska south to California, east to Idaho, Montana, Nevada and Utah.
Habitat: Mountain meadows, scree, and rock crevices at moderate to high elevations.
Origin: Native
Flowers: June-September
Microgilia minutiflorasmall-flowered gilia, small-flower skyrocket
Origin: Native
Micromonolepis pusillared povertyweed
Distribution: Occurring in central Washington; disjunct in central Washington, otherwise from southern Oregon to California, Nevada, Utah, Wyoming, and Colorado.
Habitat: Sagebrush-steppe desert, often where alkaline.
Origin: Native
Flowers: May-June
Microseris bigeloviicoast microseris, coastal silverpuffs
Origin: Native
Flowers: May - June
Microseris borealisapargidium, bog microseris, northern silverpuffs
Distribution: Occurring west of the Cascades crest in Washington; southern Alaska south to northern California.
Habitat: Sphagnum bogs and wet meadows in the mountains.
Origin: Native
Flowers: June-August
Microseris laciniatacut-leaved microseris
Distribution: Washington to California, from the eastern foothills of the Cascades to the coast.
Habitat: Usually in fairly moist meadows.
Origin: Native
Flowers: May - July
ssp. laciniata – cutleaf microseris, cut leaved scorzonella
ssp. leptosepala – cut-leaved silverpuffs, cutleaf silverpuffs
Microseris nutansnodding microseris, nodding scorzonella, nodding silverpuffs
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains and South Dakota.
Habitat: Open areas to open forests, somewhat moist places, low to mid-elevations.
Origin: Native
Flowers: April-July
Microsteris gracilisslender phlox
Distribution: Widely distributed throughout Washington; Alaska south to California, east to the Rocky Mountains and the Great Plains in the U.S.
Habitat: Lowlands and foothills in open, dry to moderately moist places.
Origin: Native
Flowers: March-June
Microthlaspi perfoliatumperfoliate pennycress
Distribution: Only found along eastern border in Washington; central and eastern U.S.
Habitat: Roadsides, pastures, and other open, disturbed ground.
Origin: Introduced from Europe
Flowers: March-May
Mimetanthe pilosadowny monkey-flower, false monkey-flower
Origin: Native
Mimulus ringensAllegheny monkeyflower
Distribution: Occurring along the Columbia and Snake rivers in Washington, where introduced; native to eastern North America.
Habitat: Riparian corridors in open sites, tolerant of episodic or extensive inundation.
Origin: Introduced
Flowers: August-September
var. ringens – Allegheny monkey-flower
Mirabilis nyctagineafour-o'clock, heartleaf umbrellawort four-o'clock
Distribution: Occurring east of the Cascades in Washington; Native east of the Rockies, Montana to Mexico, east to Wisconsin.
Habitat: Disturbed areas of dry valleys and plains.
Origin: Introduced from east of the Rocky Mountains
Flowers: June-August
Miscanthus sinensisChinese silvergrass
Origin: Introduced
Misopates orontiumlesser snapdragon, weasel's snout
Distribution: Occasionally escaped from cultivation in western Washington.
Habitat: Disturbed areas in urban settings.
Origin: Introduced
Flowers: May-July
Mitella nudabare-stemmed mitrewort
Distribution: Alaska south to the Cascades of northwest Washington, east to Labrador and south to north-central Montana.
Habitat: Damp woods, along streams and in bogs.
Origin: Native
Flowers: June - August
Mitellastra caulescensleafy mitrewort, star-shaped mitrewort
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to northwest California, east to Idaho and Montana.
Habitat: Shady woods, wet meadows and swamps, low to mid-elevations.
Origin: Native
Flowers: April-June
Moehringia lateriflorablunt-leaf sandwort, bluntleaf sandwort
Distribution: Occurring on both sides of the Cascades in Washington, though more common east of the crest; occurring throughout much of North America except along the southern U.S. boundary.
Habitat: Forest understory and edge, open meadows.
Origin: Native
Flowers: May-August
Moehringia macrophyllalarge-leaf sandwort
Distribution: Both sides of the Cascades, east to the Atlantic Coast
Habitat: Moist to dry, shaded to open woods, meadows and rocky slopes in the mountains
Origin: Native
Flowers: May - August
Moenchia erectaupright chickweed
Distribution: Occurring west of the Cascades in Washington; British Columbia south to California; in scattered locations in other parts of the central and southern U.S.
Habitat: Open, disturbed areas at low elevations.
Origin: Introduced
Flowers: April-May
Molinia caeruleapurple moor grass
Distribution: Known from a single locality in King County where it is persistent; occurring in scattered locations throughout North America.
Habitat: Disturbed areas at low elevation near the coast.
Origin: Introduced
Flowers: May-June
Mollugo verticillatacarpetweed, green carpetweed
Distribution: Chiefly east of the Cascades in Washington; British Columbia south to Baja California, east over nearly all of temperate North America.
Habitat: Moist, often waste ground, especially along river banks.
Origin: Native
Flowers: June-October
Monarda didymascarlet beebalm, Oswego tea
Origin: Introduced from eastern North America
Monarda fistulosawild bergamot
Origin: Native
Monardella odoratissimamountain monardella
Distribution: Chiefly east of the Cascades in Washington; Washington to California, east to Idaho and Nevada.
Habitat: Open, dry, often rocky places, low deserts to mid-elevations in the mountains.
Origin: Native
Flowers: May-August
ssp. discolor – mountain monardella
ssp. odoratissima – mountain monardella
Moneses uniflorasingle-delight
Distribution: Distributed on both sides of the Cascades in Washington; Alaska south to California, east to the Rocky Mountains and in eastern North America.
Habitat: Moist woods with high-humas soils, sea level to mid-elevations in the mountains.
Origin: Native
Flowers: May-July
Monotropa hypopitysmany-flower Indian-pipe
Distribution: On both sides of the Cascades in Washington; British Columbia south to California, east to the Atlantic Coast.
Habitat: In humus of coniferous forests at low to mid-elevations.
Origin: Native
Flowers: May-July
Monotropa unifloraone-flower Indian-pipe
Distribution: Chiefly west of the Cascades in Washington; widely distributed throughout North America except for Alaska, Yukon Territory, Nevada, and southern Rocky Mountain states.
Habitat: In humus in deep, shady woods at low to moderate elevations.
Origin: Native
Flowers: June-August
Montia chamissoiChamisso's montia, water montia
Distribution: Occurring east of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains; scattered locations east of the Mississippi in the U.S.
Habitat: Wet areas, often in water, from the lowlands to mid-elevations in the mountains.
Origin: Native
Flowers: May-August
Montia dichotomadwarf montia
Distribution: Western Washington to northern Casifornia, east to Idaho and western Montana.
Habitat: Moist areas in the lowlands.
Origin: Native
Flowers: April - June
Montia diffusaspreading candyflower, branching montia
Distribution: West side of the Cascades, southern British Columbia to Marin County, California.
Habitat: Moist woods at low elevation.
Origin: Native
Flowers: April - July
Montia fontanawater blinks, water chickweed
Distribution: Alaska to California, east to Greenland and Maine
Habitat: Wet places, sometimes aquatic and floating, low to moderate elevations
Origin: Native
Flowers: March - July
Montia howelliiHowell's montia
Distribution: West of the Cascades, British Columbia to California.
Habitat: Moist lowland areas.
Origin: Native
Flowers: April - May
Montia linearislineleaf Indian lettuce, narrow-leafed montia
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
Montia parvifoliastreambank springbeauty
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to Montana and Idaho.
Habitat: Somewhat moist, open, often rocky, slopes and outcroppings, sea level to moderate elevations in the mountains.
Origin: Native
Flowers: May-August
Morella californicaPacific bayberry
Distribution: Along the southern half of the outer coast in Washington; British Columbia south to California.
Habitat: Sandy, moist areas.
Origin: Native
Flowers: April-May
Morus albawhite mulberry
Distribution: Chiefly east of the Cascades in Washington; widely established throughout North America.
Habitat: Disturbed ground, waste areas; commonly established along riparian zones of rivers and streams.
Origin: Introduced from Asia
Flowers: April-June
Muhlenbergia andinafoxtail muhly
Origin: Native
Flowers: July - September
Muhlenbergia asperifoliaor alkali muhly, scratchgrass
Distribution: British Columbia south, east of the Cascades, to California, east to Montana and Texas.
Habitat: Dry to moist alkaline places.
Origin: Native
Flowers: June - September
Muhlenbergia filiformispull-up muhly
Distribution: British Columbia south to California, east to Alberta and New Mexico.
Habitat: Usually near warm springs or seepage areas, in moist meadows of mountain valleys to subalpine slopes.
Origin: Native
Flowers: July - August
Muhlenbergia glomerataspiked muhly
Origin: Native
Muhlenbergia mexicanawirestem muhly
Origin: Native
Muhlenbergia minutissimaannual muhly, least muhly
Origin: Native
Flowers: July
Muhlenbergia racemosagreen muhly
Origin: Native
Flowers: August - September
Muhlenbergia richardsonismatted muhly
Distribution: British Columbia south, east of the Cascade crests, to Baja California, east to New Brunswick and New Mexico.
Habitat: Moist to dry lowlands, meadows, mountain prairies and rocky slopes.
Origin: Native
Flowers: July - August
Murdannia keisakwart-removing-herb
Distribution: Widely introduced in southeastern United States; occasional in Washington.
Habitat: Ditches, swales and swamps, often in water.
Origin: Introduced
Flowers: August - October
Muscari armeniacumgarden grape-hyacinth
Origin: Introduced from Eurasia
Muscari botryoidescommon grape-hyacinth
Origin: Introduced
Muscari neglectumgrape-hyacinth
Origin: Introduced from Europe
Mycelis muraliswall lettuce
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
Myosotis arvensismouse ear, rough forget-me-not, field scorpiongrass
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to Oregon, east across the northern half of North America to the Atlantic Coast.
Habitat: Fields, roadsides, wastelots, and forest openings, typically associated with disturbance.
Origin: Introduced from Europe
Flowers: May-July
Myosotis discoloryellow and blue scorpiongrass, yellow scorpiongrass
Distribution: Introduced in Washington to California, east to Montana, and along the East Coast
Habitat: Roadsides, dry to moist open areas
Origin: Introduced from Europe
Flowers: May - August
Myosotis laxabay forget-me-not, small forget-me-not
Distribution: Widely distributed on both sides of the Cascades in Washington; British Colombia and Alberta south to California, east to the Rocky Mountains; also in the eastern half of North America.
Habitat: In moist soil and shallow water, at low to moderate elevations.
Origin: Native
Flowers: June-September
Myosotis micranthablue scorpion-grass
Distribution: Introduced over most of northern United States and southern Canada; in Washington, chiefly east of the Cascades, where fairly common.
Habitat: Roadsides, stream banks, and moist to dry open places.
Origin: Introduced
Flowers: April - June
Myosotis scorpioidescommon forget-me-not, true forget-me-not, water forget-me-not
Distribution: Introduced in much of western and eastern United States; uncommon in the Pacific Northwest
Habitat: Low to mid-elevations in the mountains
Origin: Introduced from Eurasia
Flowers: June - August
Myosotis sylvaticawood forget-me-not
Distribution: Introduced in western Washington and some mid-West and Eastern states
Habitat: Roadsides and moist woods at low elevations
Origin: Introduced from Europe
Flowers: June - August
Myosotis vernaspring forget-me-not, early scorpiongrass, spring scorpiongrass, white scorpiongrass
Origin: Native
Flowers: May - July
Myosoton aquaticumgiant chickweed, water chickweed
Distribution: Introduced in much of eastern United States; occasional in the Pacific Coast states and British Columbia.
Habitat: Stream banks, woods, marshes and wet meadows.
Origin: Introduced from Europe
Flowers: June - October
Myosurus ×alopecuroides
Distribution: Occurring east of the Cascades crest in Washington; Washington south, east of the Cascades, to Oregon, east to Idaho.
Habitat: Sagebrush-steppe.
Origin: Native
Flowers: March-May
Myosurus apetalusbristly mouse-tail, sedge mouse-tail
Distribution: East side of the Cascades, British Columbia to California, east to Wyoming
Habitat: Moist areas and vernal streambeds, mostly low elevation grasslands and sagebrush, occasionally to subalpine
Origin: Native
Flowers: Late March - early June
var. borealis – sedge mouse-tail
Myosurus minimustiny mousetail
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to south-central Canada and across the central U.S. to the southeastern states.
Habitat: Wet places, especially vernal pools.
Origin: Native
Flowers: April-June
Myosurus sessilisshortstemmed mouse-tail, vernal pool mouse-tail
Distribution: Known from Klickitat County in Washington; South-central Washington south to north-central Oregon, also in central California.
Habitat: Vernal pools.
Origin: Native
Flowers: April-June
Myrica galesweetgale
Distribution: West of the Cascades in Washington; Alaska south to Oregon, east across northern Canada, upper Midwest, and northeastern U.S.
Habitat: Coastal bogs, swamps, lakes and streams.
Origin: Native
Flowers: April-June
Myriophyllum aquaticumparrot's feather, water feather, South American water milfoil
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout much of North America.
Habitat: Ponds and slow-moving streams.
Origin: Introduced from South America
Flowers: May-July
Myriophyllum heterophyllumtwo-leaf milfoil, various-leaved water-milfoil
Distribution: Known only from Puget Sound lowlands in Washington; British Columbia south to California; widely distributed east of the Mississippi River in Canada and the U.S where apparently it is native.
Habitat: Lakes and ponds.
Origin: Introduced
Flowers: May-October
Myriophyllum hippuroideswestern milfoil, western water milfoil
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia south to California; also in Illinois.
Habitat: Ponds and slow-moving streams.
Origin: Native
Flowers: May-October
Myriophyllum pinnatumcutleaf water-milfoil
Distribution: Known in Washington only from Thurston County; southern British Columbia to Oregon, also in eastern North America.
Habitat: Lakes, sloughs, ditches, slow streams.
Origin: Native
Flowers: June-August
Myriophyllum quitenseAndean water milfoil, waterwort water milfoil
Distribution: Occurring in scattered locations in Washington; British Columbia south to California, east across Canada to New Brunswick, east in the U.S. to Idaho, Wyoming, and Utah; occurring in Mexico and South America.
Habitat: Ponds and slow-moving streams.
Origin: Native
Flowers: June-August
Myriophyllum sibiricumAmerican milfoil, northern milfoil, Siberian water milfoil
Distribution: Widespread in North America; British Columbia south the California, east to the Atlantic Coast.
Habitat: Ponds and quiet streams, often in brackish water.
Origin: Native
Flowers: June - August
Myriophyllum spicatumEurasian water milfoil, spiked water milfoil
Distribution: Widely distributed throughout Washington; widely distributed throughout North America.
Habitat: Ponds, lakes, and quiet streams.
Origin: Introduced from Eurasia
Flowers: April-October
Myriophyllum spicatum × Myriophyllum sibiricumhybrid Eurasian milfoil
Origin: Introduced
Myriophyllum ussurienseterrestrial water milfoil, Ussurian milfoil
Distribution: Known in Washington only from Skamania County;
Habitat: Freshwater intertidal zone on mudflats. British Columbia south to Oregon; circumboreal.
Origin: Native
Flowers: June-August
Myriophyllum verticillatumverticillate milfoil, whorled water milfoil
Distribution: Distributed on both sides of the Cascades in Washington;
Habitat: Aquatic habitats below the water surface.
Origin: Native
Flowers: June-August
Myriopteris gracilisFee's lip fern, slender fern, Fee's lace-fern
Origin: Native
Myriopteris gracillimalace fern, lace lip fern
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
Myrrhis odorata
Origin: Introduced