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: Occurring east of the Cascades crest in southeastern Washington; south-central Washington to California, east to west-central Idaho, native from the south-central U.S. to the mid-Atlantic states.
Habitat: Open, disturbed areas, often along riparian corridors or abandoned fields.
Origin: Introduced from elsewhere in United States
Flowers: May-June
Growth Duration: Perennial
Madia citriodoralemon-scented tarplant, lemon tarweed, lemon-scented tarweed
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to Nevada.
Habitat: Dry, open hillsides and foothills.
Origin: Native
Flowers: May-June
Growth Duration: Annual
Madia eleganscommon madia, autumn showy tarweed
Distribution: Occurring chiefly in the Columbia River Gorge in Washington; south-central Washington to California.
Habitat: Dry, open places, often becoming a roadside weed.
Origin: Native
Flowers: July-September
Growth Duration: Annual
Madia exiguathreadstem madia, little tarplant, little tarweed
Distribution: Occurring on both sides of the Cascades crest in Washington, but more common east of the crest; British Columbia to California, east to Montana, Idaho, and Nevada.
Habitat: Dry, open woods, grasslands, roadsides, and other open areas where often disturbed, from the plains and foothills, occasionally up to middle elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Annual
Madia glomeratamountain tarplant, cluster tarweed, mountain tarweed
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska 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 sagebrush plains to middle elevations in the mountains.
Origin: Native
Flowers: July-September
Growth Duration: Annual
Madia gracilisgrassy tarplant, common tarweed, slender tarweed
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Montana, Idaho, Nevada, and Utah.
Habitat: Dry, open areas from shrub-steppe to middle elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Annual
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
Growth Duration: Annual
Mahonia aquifoliumholly-leaf Oregon-grape, shining Oregon-grape, tall Oregon-grape
Distribution: Occurring on both sides of the Cascades crest in Washington; southern British Columbia to Northern California, east to northern Idaho and western Montana.
Habitat: Sagebrush slopes and open woods.
Origin: Native
Flowers: March-May
Growth Duration: Perennial
Mahonia nervosaCascade Oregon-grape, dull Oregon-grape
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, east to western Montana.
Habitat: Generally in light woodland and forest edge.
Origin: Native
Flowers: April-May
Growth Duration: Perennial
Mahonia repenscreeping Oregon-grape, low Oregon-grape
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Sagebrush valleys to open forested slopes.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Maianthemum dilatatumwild lily-of-the-valley, may-lily, two-leaf false Solomon's-seal
Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; Alaska to California, east to northern Idaho.
Habitat: Shady, moist areas, open to dense woods, from sea level to middle elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Maianthemum racemosumlarge false Solomon's seal, false spikenard
Distribution: Widely distributed on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and northern Great Plains, also from the central U.S. to the Atlantic Coast of eastern North America.
Habitat: Open woodlands, forest edge, moist meadow and forest openings from sea level to middle elevations in the mountains.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
ssp. amplexicaule – plumed Solomon's seal, plumed spikenard
Maianthemum stellatumstar-flowered Solomon's-seal
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east to the Great Plains, Great Lakes region, and northeastern North America.
Habitat: Moist woods and streambanks to open, rocky hillsides from low elevations to the subalpine.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Malaxis monophylloswhite adder's-mouth, one-leaved malaxis
Distribution: Reported to occur west of the Cascades crest in northwestern Washington, though no specimens seen; Alaska to northwestern Washington, east across Canada to the Great Lakes region and northeastern North America; disjunct in California and Colorado; also in Japan.
Habitat: Lowland bogs and swamps.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
var. brachypoda – North American white adder's-mouth
Malus baccataSiberian crabapple
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; southwestern British Columbia to southern Washington.
Habitat: Mesic thickets and riparian zones.
Origin: Introduced from Eurasia
Flowers: April-June
Growth Duration: Perennial
Malus ×dawsonianaDawson apple
Distribution: Occurring west of the Cascades crest in Washington; Washington to Oregon.
Habitat: Fields, thickets, open damp forests, sea bluffs, roadsides, wastelots, and abandoned homesteads.
Origin: Escaping from cultivation
Flowers: April-May
Growth Duration: Perennial
Malus domesticacultivated apple, orchard apple
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across most of North America to the Atlantic Coast.
Habitat: Mesic thickets and riparian zones.
Origin: Introduced from Asia
Flowers: April-June
Growth Duration: Perennial
Malus fuscaOregon crabapple, western crabapple
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California.
Habitat: Moist woods, swamps and open canyons from sea level to moderate elevations in the mountains.
Origin: Native
Flowers: April-May
Growth Duration: Perennial
Malus hupehensisflowering tea crabapple
Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to southwestern Washington, also in Illinois.
Habitat: Seasonally damp thickets, open forest.
Origin: Introduced from Asia
Flowers: April-June
Growth Duration: Perennial
Malus prunifoliapearleaf crabapple, plumleaf crabapple
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; Washington to northern Oregon, also in the Great Lakes region and northeastern North America.
Habitat: Damp thickets, forest edges, and riparian zones.
Origin: Introduced from Asia
Flowers: April-June
Growth Duration: Perennial
Malva moschatamusk mallow
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to California, east to Montana and Wyoming, also in eastern North America.
Habitat: Roadsides, fields, and wastelots, where escaping from cultivation.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Perennial
Malva neglectadwarf mallow
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Roadsides, forest edge, fields, ditches, wastelots, and other disturbed open areas.
Origin: Introduced from Europe
Flowers: May-September
Growth Duration: Annual, Biennial, Perennial
Malva parvifloracheeseweed, alkali mallow, small-whorl mallow
Distribution: Occurring west of the Cascades crest in lowland western Washington; British Columbia to California, east to the Great Plains, also in southeastern and northeastern North America.
Habitat: Roadsides, forest edge, fields, ditches, wastelots, and other disturbed open areas.
Origin: Introduced from Eurpoe
Flowers: March-August
Growth Duration: Annual
Malva pusillalow mallow
Distribution: Occurring west of the Cascades crest in lowland western Washington; British Columbia to California, east to Idaho, also in the eastern half of North America.
Habitat: Roadsides, fields, ditches, wastelots, and other disturbed open areas.
Origin: Introduced from Europe
Flowers: May-August
Growth Duration: Annual
Malva sylvestriscommon mallow, high mallow
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.
Habitat: Roadsides, forest edge, fields, ditches, wastelots, and other disturbed open areas.
Origin: Introduced from Europe
Flowers: May-September
Growth Duration: Annual, Biennial, Perennial
Malvella leprosaalkali-mallow
Distribution: Occurring east of the Cascades crest in Washington; north-central Washington to California, east to southern Idaho, the southern Rocky Mountains, and the southern Great Plains.
Habitat: Sagebrush deert, typically in sandy (often alkaline) soil.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
Marah oreganacoastal manroot
Distribution: Occurring chiefly west of the Cascades crest and east in the Columbia River Gorge in Washington; British Columbia to California, also rarely in Hells Canyon in Idaho.
Habitat: Low elevation fields, thickets and open areas.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Marrubium vulgarewhite horehound
Distribution: Occurring on both sides of the Cascades crest in Washington Alaska to California, east across most of North America to the Atlantic Coast.
Habitat: Fields, roadsides, thickets, wastelots, and other disturbed areas.
Origin: Introduced from Eurasia
Flowers: June-October
Growth Duration: Perennial
Marsilea muticaAustralian waterclover
Distribution: Occurring in scattered counties west of the Cascades crest in Washington; also known from California and the southeastern U.S.
Habitat: Lowland ponds in water to 1 meter deep.
Origin: Introduced from Australia
Spores: June-October
Growth Duration: Perennial
Marsilea oligosporaNelson's pepperwort, Pacific clover-fern water-clover
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to Montana, Wyoming, and Utah.
Habitat: Ponds and marshes, in wet depressions in sagebrush and less commonly on river margins.
Origin: Native
Spores: June-October
Growth Duration: Perennial
Marsilea vestitahairy clover-fern, pepperwort, water-clover pepperwort
Distribution: Occurring chiefly east of the Cascades crest and in the Columbia River Gorge in Washington; British Columbia to California, east to the Great Plains and southeastern U.S.
Habitat: Ponds, vernal pools, and floodplains from low to middle elevations.
Origin: Native
Spores: April-October
Growth Duration: Perennial
Matricaria chamomillawild chamomile, scented mayweed
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to California, east in sporadic occurrences to the Atlantic Coast.
Habitat: Roadsides, fields, wastelots, and other disturbed sites.
Origin: Introduced from Europe
Flowers: April-June
Growth Duration: Annual
Matricaria discoideapineapple weed
Distribution: Widely distributed on both sides of the Cascades crest Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Fields, roadsiides, wastelots, and other disturbed, open areas.
Origin: Native
Flowers: May-September
Growth Duration: Annual
Matthiola incanahoary stock
Distribution: Occurring in scattered locations west of the Cascades crest in lowland western Washington; also known from California and Texas.
Habitat: Roadsides, sandy cliffs, beaches, wastelots, and other disturbed, open areas where escaped from cultivation.
Origin: Introduced from Europe
Flowers: June-July
Growth Duration: Biennial, Perennial
Matthiola longipetala
Origin: Introduced
Mazus pumilusJapanese mazus
Distribution: Occurring east of the Cascades crest and in the Columbia River Gorge in Washington; southern Washington to adjacent northern Oregon along the Columbia River; also in the southeastern U.S.
Habitat: Moist, sandy or silty riverbanks, and lawns.
Origin: Introduced from Asia
Flowers: May-November
Growth Duration: Annual
Meconella oreganawhite fairy-poppy
Distribution: Occurring west of the Cascades crest in lowland western Washington; southwestern British Columbia to California.
Habitat: Open ground, balds, and prairies where wet in the spring.
Origin: Native
Flowers: March-April
Growth Duration: Annual
Medicago arabicaspotted medic
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, also in the southeastern U.S.
Habitat: Disturbed areas including wastelots, roadsides and fields.
Origin: Introduced from Eurasia
Flowers: April-July
Growth Duration: Annual
Medicago lupulinahop clover, black medic
Distribution: Widely distributed throughout Washington; widely distributed throughout much of North America.
Habitat: Roadsides, fields, lawns, wastelots, and other disturbed areas, often on sandy or gravelly soil.
Origin: Introduced from Eurasia
Flowers: April-August
Growth Duration: Annual, Perennial
Medicago minimalittle bur-clover, bur medic
Distribution: Occurring in the east end of the Columbia River Gorge in Washington; Washington to California, east along the southern U.S. to eastern North America, also in the Hells Canyon area in Idaho.
Habitat: Roadsides, wastelots, and other disturbed, open areas.
Origin: Introduced from Eurasia
Flowers: March-June
Growth Duration: Annual
Medicago polymorphabur-clover, toothed medic, smooth medic
Distribution: Occurring chiefly west of the Cascades crest in Washington; southwestern British Columbia to California, scattered eastward across much of North America.
Habitat: Waste ground and disturbed areas, mostly at low elevations.
Origin: Introduced
Flowers: March-June
Growth Duration: Annual, Perennial
Medicago sativaalfalfa, lucerne
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east to the Atlantic Coast.
Habitat: Roadsides, fields, wastelots, and other disturbed, open areas; often escaping from commercial cultivation.
Origin: Introduced
Flowers: May-October
Growth Duration: Annual, Perennial
ssp. falcata – yellow alfalfa
ssp. sativa – alfalfa, lucerne
ssp. ×varia – alfalfa
Melampyrum linearenarrow-leaved cow-wheat
Distribution: Occurring east of the Cascades crest in northeastern Washington; British Columbia 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
Growth Duration: Annual
Melica aristatabearded melic grass
Distribution: Known historically in Washington from the Lewis River in Skamania County, but now best considered extirpated in Washington; southern Washington to California.
Habitat: Dry forest, rocky slopes, ridges, and ledges.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
Melica bulbosabulbous onion grass, bulbous oniongrass
Distribution: Occurring east of the Cascades crest in Washington;
Habitat: Grassland, sagebrush, open forest, rocky slopes, and talus.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Melica fugaxsmall melic grass
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Idaho and Nevada.
Habitat: Meadows, damp or dry slopes, open forest, and riparian zones.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Melica harfordiiHarford's melic grass
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California.
Habitat: Rocky slopes and dry open forest.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Melica smithiiSmith's melic grass
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to Oregon, east to Alberta, Montana, Wyoming and South Dakota; also in eastern Canada.
Habitat: Moist woods from the lowlands to middle elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Melica spectabilisshowy melic grass
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to Alberta, 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: May-July
Growth Duration: Perennial
Melica subulataAlaska oniongrass
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Open slopes to thick, dry or moist woods, from near sea level to middle elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Melilotus albuswhite sweet-clover
Distribution: Widely distributed on both sides of the Cascades crest in Washington; widely distributed across most of North America.
Habitat: Roadsides, fields, wastelots, and other disturbed open areas at low to middle elevations.
Origin: Introduced from Eurasia
Flowers: May-October
Growth Duration: Annual, Biennial
Melilotus indicusannual yellow sweet-clover, small-flowered yellow sweet-clover
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to California, east to Idaho, Utah, and Nevada, further east across the southern U.S. and in eastern North America.
Habitat: Roadsides, fields, wastelots, and other disturbed open areas.
Origin: Introduced from Eurasia
Flowers: May-July
Growth Duration: Annual
Melilotus officinalisyellow sweet-clover
Distribution: Widely distributed on both sides of the Cascades crest in Washington; widely distributed throughout North America.
Habitat: Roadsides, fields, wastelots, and other disturbed open areas.
Origin: Introduced from Eurasia
Flowers: May-September
Growth Duration: Annual, Biennial, Perennial
Melissa officinalislemonbalm
Distribution: Occurring chiefly west of the Cascades crest and in the Columbia River Gorge in Washington; Alaska to California, east to Idaho and Montana; also in central and eastern North America.
Habitat: Roadsides and other disturbed habitats.
Origin: Introduced from Eurasia
Flowers: June-August
Growth Duration: Perennial
Mentha aquaticabergamot mint, water mint
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to California; central and eastern North America.
Habitat: Lake and pond shores, riparian areas, and wetlands.
Origin: Introduced from Europe
Flowers: June-September.
Growth Duration: Perennial
Mentha canadensiswild mint
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east across Canada and most of the United States to the Atlantic Coast.
Habitat: Common in lake and pond shore margins, riparian zones, wetlands, and other wet areas at low elevations.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Mentha ×piperitapeppermint
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Idaho, further east across much of North America to the Atlantic Coast.
Habitat: Banks of streams and ditches, bottom lands and moist roadsides.
Origin: Introduced from Europe
Flowers: July-September
Growth Duration: Perennial
Mentha pulegiumpennyroyal
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to California; also scattered in eastern North America.
Habitat: Moist, disturbed areas.
Origin: Introduced from Europe
Flowers: July-October
Growth Duration: Perennial
Mentha spicataspearmint
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across much of North America to the Atlantic Coast.
Habitat: Banks of streams and ditches and other damp places.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Perennial
Mentha suaveolensapple mint
Distribution: Occurring west of the Cascades crest in Washington, where questionably established in the flora; southwestern British Columbia to California; established in other areas of North America.
Habitat: Roadsides, wasteland, and other disturbed sites.
Origin: Introduced from Europe
Flowers: July-September
Growth Duration: Perennial
Mentzelia albicauliswhite-stem blazing-star
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Dry, usually sandy soil in the shrub-steppe to the foothills.
Origin: Native
Flowers: May-July
Growth Duration: Annual
Mentzelia dispersabushy blazing-star
Distribution: Occurring east of the Cascades crest in Washington; Washington to southern California, east to the Rocky Mountains and northern Great Plains.
Habitat: Dry soil, from the plains into the canyons and slopes of the lower mountains.
Origin: Native
Flowers: May-July
Growth Duration: Annual
Mentzelia laevicaulisgiant blazing-star
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to Montana and Wyoming.
Habitat: Dry, often rocky or gravelly soil, desert valleys to lower mountains.
Origin: Native
Flowers: July-September
Growth Duration: Biennial, Perennial
var. laevicaulis – common blazing-star, blazing star mentzelia
var. parviflora – common , blazing star mentzelia
Mentzelia montanamountain blazing-star
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to Idaho, Wyoming, Colorado, New Mexico, and Texas.
Habitat: Montane slopes and forest openings.
Origin: Native
Flowers: May-July
Growth Duration: Annual
Menyanthes trifoliatabuck-bean
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, northern Great Plains, Great Lakes region, and northeastern North America.
Habitat: Bogs, marshes, ponds and lakes in shallow water, from low to middle elevations in the mountains.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Mertensia amoenabeautiful bluebells, sagebrush bluebells
Distribution: Occurring east of the Cascades crest in central Washington; central Washington to Montana, south to Wyoming and Utah.
Habitat: Seasonally moist slopes and rocky areas in sagebrush desert.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Mertensia brachycalyxshort-sepaled bluebells
Distribution: Occurring east of the Cascades crest in Washington; Washington to Oregon, east to Idaho and Montana.
Habitat: Stream and riverbanks, wet meadows, and talus slopes.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Mertensia longifloralong-flowered bluebells, trumpet bluebells, long-flowered lungwort
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to Montana and Nevada.
Habitat: Drier areas from low elevation sagebrush deserts to middle elevations in the mountains.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Mertensia oblongifoliaoblong-leaved bluebell, sagebrush bluebell
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, Montana, Wyoming, Utah, and Nevada.
Habitat: Deeper soils in sagebrush habitat.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Mertensia paniculatanorthern bluebell, tall bluebell
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to Oregon, east to Montana, also in the Great Lakes region and eastern Canada.
Habitat: Streambanks and wet meadows at mid-elevations in the mountains
Origin: Native
Flowers: May-August
Growth Duration: Perennial
var. borealis – northern bluebell
var. paniculata – tall bluebell
Mertensia platyphyllabroadleaf bluebell
Distribution: Occurring west of the Cascades crest in Washington, where currently considered endemic.
Habitat: Stream banks and moist, low woods at lower elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Mertensia umbratilisshade bluebell
Distribution: Occurring east of the Cascades crest in Washington; Washington to Oregon.
Habitat: Forest openings and seasonally moist areas at low to middle elevations.
Origin: Native
Flowers: April-May
Growth Duration: Perennial
Micranthes apetalaTiny swamp saxifrage, western swamp saxifrage
Distribution: Occurring east of the Cascades crest in Washington; Washington to Oregon, east to Idaho and Montana.
Habitat: Vernally moist meadows at low to middle elevations.
Origin: Native
Flowers: March-May
Growth Duration: Perennial
Micranthes ferruginearusty saxifrage
Distribution: Occurring in the Cascades and Olympic Mountains, and in the mountains of northeastern in Washington; Alaska to south California, east to Idaho, Montana, and Wyoming.
Habitat: Open, moist, often rocky areas, from low to middle elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
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
Growth Duration: Perennial
Micranthes gormaniiGorman's saxifrage
Distribution: Occurring west of the Cascades crest in the Lower Columbia River Gorge; southwestern Washington to adjacent Oregon.
Habitat: Wet rocky ledges and slopes.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Micranthes idahoensisIdaho saxifrage
Distribution: Washington and Oregon, east to Montana and Idaho.
Habitat: Exposed areas, ledges, and open slopes.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
Micranthes integrifoliaColumbian saxifrage, swamp saxifrage, whole-leaf saxifrage
Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; British Columbia to California.
Habitat: Prairies, grassy slopes and vernally moist areas, sea level to subalpine.
Origin: Native
Flowers: March-July
Growth Duration: Perennial
Micranthes lyalliiLyall's saxifrage, red-stemmed saxifrage
Distribution: Occurring on both sides of the Cascades crest in northern Washington; Alaska to Washington, east to Alberta, Idaho, and Montana.
Habitat: Wet, gravelly meadows and along streams and ponds at high elevations.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Micranthes nelsonianadotted saxifrage
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to Oregon, east to Nunavut and Alberta.
Habitat: Montane wet areas and streambanks from low to middle elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
var. cascadensis – Cascades dotted saxifrage, Nelson's saxifrage
Micranthes nidificaColumbia saxifrage, swamp saxifrage
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Montana and Wyoming.
Habitat: Prairies and wet banks to subalpine meadows.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
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
Growth Duration: Perennial
Micranthes odontolomabrook saxifrage, streambank saxifrage
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Streambanks, lake shores and wet meadows from low elevations in the mountains to the alpine.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
Micranthes oreganabog saxifrage, Oregon saxifrage
Distribution: Both sides of the Cascades crest in Washington; Washington 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
Growth Duration: Perennial
Micranthes rufidularusty-hair saxifrage
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California.
Habitat: Wet open areas, ledges, rock outcroppings from moderate to high elevations in the mountains.
Origin: Native
Flowers: February-August
Growth Duration: Perennial
Micranthes tischiiOlympic saxifrage
Distribution: Endemic to Washington, where known from the Olympic Mountains and Washington Pass in Okanogan County.
Habitat: Forested ledges and rock crevices where moist.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
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
Growth Duration: Perennial
Microgilia minutiflorasmall-flowered gilia, small-flower skyrocket
Distribution: Occurring east of the Cascades crest in Washington; south-central British Columbia to eastern Oregon, east to western Montana and southern Idaho.
Habitat: Dry, sandy places at low elev, often with sagebrush.
Origin: Native
Flowers: April-June
Growth Duration: Annual
Micromonolepis pusillared povertyweed
Distribution: Occurring east of the Cascades crest in Washington; disjunct in central Washington, otherwise from southern Oregon to California, east to Nevada, Utah, Wyoming, and Colorado.
Habitat: Sagebrush-steppe desert, often where alkaline.
Origin: Native
Flowers: May-June
Growth Duration: Annual
Micropus californicuscottontop, Q-tips
Distribution: Occurring east of the Cascades crest in the Columbia River Gorge in Washington; south-central Washington to California.
Habitat: Dry, open areas at low to moderate elevations.
Origin: Native
Flowers: April-May
Growth Duration: Annual
var. californicus – cottontop, Q-tips
Microseris bigeloviicoast microseris, coastal silverpuffs
Distribution: Known historically from west of the Cascades crest in the San Juan Islands in Washington, but now considered extirpated; southwestern British Columbia to California.
Habitat: Coastal sandy soils, dunes, occasionally in rocky areas, coastal islands, headlands, and bluffs.
Origin: Native
Flowers: May-June
Growth Duration: Annual
Microseris borealisapargidium, bog microseris, northern silverpuffs
Distribution: Occurring west of the Cascades crest in Washington; southern Alaska to northern California.
Habitat: Sphagnum bogs and wet meadows in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Microseris laciniatacut-leaved microseris
Distribution: Occurring west of the Cascades crest in Washington; Washington to California.
Habitat: Moist meadows and drier slopes from the lowlands to middle elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
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 to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Slopes, meadows, flats, and forest openings,often in somewhat moist places, from low to middle elevations.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
Microsteris gracilispink microsteris, slender phlox
Distribution: Occurring on both sides of the Cascades crest in Washington, though more common east of the crest; Alaska to California, east to the Rocky Mountains and Great Plains.
Habitat: Lowlands and foothills in open, dry to moderately moist places.
Origin: Native
Flowers: March-June
Growth Duration: Annual
Mimetanthe pilosadowny monkey-flower, false monkey-flower
Distribution: Occurring east of the Cascades crest in Washington; central Washington to Baja California, east to southwestern Idaho, Utah, and Arizona.
Habitat: Moist, sandy areas and dry stream beds.
Origin: Native
Flowers: May-July
Growth Duration: Annual
Mimulus ringensAllegheny monkeyflower, square-stemmed monkeyflower
Distribution: Occurring on both sides of the Cascades crest along the Columbia and Snake rivers in Washington; Washington to California, east to Idaho and Montana, also in central and eastern North America where native.
Habitat: Riparian corridors in open sites, tolerant of episodic or extensive inundation.
Origin: Introduced from central and eastern North America
Flowers: July-September
Growth Duration: Perennial
var. ringens – Allegheny monkey-flower, square-stemmed monkeyflower
Mirabilis nyctagineafour-o'clock, heartleaf umbrellawort four-o'clock
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Washington, east to Motana; native to central and eastern North America.
Habitat: Disturbed areas of dry valleys and plains.
Origin: Introduced from east of the Rocky Mountains
Flowers: June-August
Growth Duration: Perennial
Miscanthus sinensisChinese silvergrass
Distribution: Occurring chiefly west of the Cascades crest in Washington;
Habitat: Fields, roadsides, forest edge, wastelots, and other disturbed, open areas.
Origin: Introduced from Asia
Flowers: July-October
Growth Duration: Perennial
Misopates orontiumlesser snapdragon, weasel's snout
Distribution: Occurring west of the Cascades crest in Washington; Alaska to California, also in Idaho and Utah; also in eastern North America.
Habitat: Disturbed areas in urban settings.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Annual
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
Growth Duration: Perennial
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
Growth Duration: Perennial
Moehringia lateriflorablunt-leaf sandwort, bluntleaf sandwort
Distribution: Occurring on both sides of the Cascades crest in Washington, though more common east of the crest; Alaska to Oregon and Nevada, east across most of North America to the Atlantic Coast.
Habitat: Forest understory and edge, open meadows.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Moehringia macrophyllalarge-leaf sandwort
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains, also east across Canada to the Great Lakes region and northeastern North America.
Habitat: Moist to dry, shaded to open woods, meadows and rocky slopes in the mountains
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Moenchia erectaupright chickweed
Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; British Columbia to California, also in scattered locations in other parts of the central and southern U.S.
Habitat: Open, disturbed areas at low elevations.
Origin: Introduced from Europe
Flowers: April-May
Growth Duration: Annual
ssp. erecta – upright chickweed
Mollugo verticillatacarpetweed, green carpetweed
Distribution: Occurring chiefly east of the Cascades in Washington; British Columbia 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
Growth Duration: Annual
Monardella odoratissimamountain monardella
Distribution: Occurring chiefly east of the Cascades crest 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
Growth Duration: Perennial
ssp. discolor – mountain monardella
ssp. odoratissima – mountain monardella
Moneses uniflorasingle-delight
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska sto 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
Growth Duration: Perennial
Monotropa hypopitysmany-flower Indian-pipe
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Atlantic Coast.
Habitat: In humus of coniferous forests at low to mid-elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Monotropa unifloraone-flower Indian-pipe
Distribution: Occurring west of the Cascades crest, in the Columbia River Gorge, and in the northeastern counties in Washington; British Columbia to California, east to Idaho and Montana, and in all other areas of North America except the southern Rocky Mountain states.
Habitat: In forest understory and on forest edge, often in deep soil, at low to moderate elevations.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Montia chamissoiChamisso's montia, water montia
Distribution: Occurring east of the Cascades crest in Washington; Alaska 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
Growth Duration: Perennial
Montia dichotomadwarf montia
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to Idaho and western Montana.
Habitat: Moist areas in the lowlands.
Origin: Native
Flowers: April-June
Growth Duration: Annual
Montia diffusaspreading candyflower, branching montia
Distribution: Occurring chiefly west of the Cascades crest in Washington; southern British Columbia to Marin County, California.
Habitat: Moist woods at low elevation.
Origin: Native
Flowers: April-July
Growth Duration: Annual
Montia fontanawater blinks, water chickweed, annual water miner's lettuce
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Idaho, eastward across northern Canada to eastern North America.
Habitat: Wet places, including meadows, fields, lawns, and vernally moist sites, sometimes aquatic and floating, low to moderate elevations.
Origin: Native
Flowers: March-June
Growth Duration: Annual, Biennial
Montia howelliiHowell's montia
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to California.
Habitat: Moist lowland areas.
Origin: Native
Flowers: April - May
Growth Duration: Annual
Montia linearislineleaf miner's lettuce, narrow-leafed montia
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to Calfornia, east to the Rocky Mountains.
Habitat: Moist to dry, usually sandy soil, low to moderate elevations.
Origin: Native
Flowers: April-July
Growth Duration: Annual
Montia parvifolialittleleaf miner's lettuce, streambank springbeauty
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Idaho and Montana.
Habitat: Dry soils, rocky outcrops, and other open, exposed areas from the coast to the subalpine.
Origin: Native
Flowers: May-July
Growth Duration: Annual, Biennial, Perennial
Morella californicaPacific bayberry, Pacific wax-myrtle
Distribution: Occurring west of the Cascades crest along the outer coast in Washington; coastal Vancouver Island, British Columbia to California.
Habitat: Hillsides and sandy areas near the coast.
Origin: Native
Flowers: April-May
Growth Duration: Perennial
Morus albawhite mulberry
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to Idaho, also from the Great Plains eastward to the Atlantic Coast.
Habitat: Riparian corridors of rivers and streams, and other open disturbed areas where moist to wet.
Origin: Introduced from Asia
Flowers: April-June
Growth Duration: Perennial
Muhlenbergia andinafoxtail muhly
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Great Plains.
Habitat: Shores, seeps, hot springs, and moist meadows.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Muhlenbergia asperifoliaalkali muhly, scratchgrass
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Great Plains.
Habitat: Dry to moist alkaline places.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
Muhlenbergia filiformispullup muhly
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and Kansas.
Habitat: Moist or wet meadows, shores, seeps, hot springs, and stream banks.
Origin: Native
Flowers: June-August
Growth Duration: Annual
Muhlenbergia glomerataspiked muhly
Distribution: Occurring east of the Cascades crest in Washington; Yukon to northeastern Washington, Idaho and Nevada, east to the Atlantic.
Habitat: Peaty shores, rocky slopes, and roadsides.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Muhlenbergia mexicanawirestem muhly
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Atlantic Coast.
Habitat: Rocky, sandy, or silty riverbanks, shores, moist or mesic slopes, roadsides, ditches, and railroads.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Muhlenbergia minutissimaannual muhly, least muhly
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to the Great Plains.
Habitat: Springs, shores, damp or dry rocky slopes, and moist meadows.
Origin: Native
Flowers: July-September
Growth Duration: Annual
Muhlenbergia richardsonismatted muhly
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains, Great Plains, Great Lakes region, and northeastern North America.
Habitat: Moist to dry lowlands, meadows, mountain prairies and rocky slopes.
Origin: Native
Flowers: July-August
Growth Duration: Perennial
Murdannia keisakwart-removing-herb
Distribution: Occurring west of the Cascades crest in the Lower Columbia River corridor in Washington; southwestern Washington and adjacent northwestern Oregon; also in southeastern United States.
Habitat: Ditches, swales and swamps, often in water.
Origin: Introduced from Asia
Flowers: August-October
Growth Duration: Perennial
Muscari armeniacumArmenian grape-hyacinth, garden grape-hyacinth
Distribution: Occurring chiefly west of the Cascades crest in Washington; southwestern British Columbia to Oregon, also in Oregon.
Habitat: Forest edge, distrubed, open areas.
Origin: Introduced from Eurasia
Flowers: March-May
Growth Duration: Perennial
Muscari botryoidescommon grape-hyacinth
Origin: Introduced
Mycelis muraliswall lettuce
Distribution: Occurring on both sides of the Cascades crest in Washington, but more common west of the crest; British Columbia to Oregon; also in eastern North America.
Habitat: Roadsides, fields, wastelots, and other disturbed, open areas from the lowlands to middle elevations in the mountains.
Origin: Introduced from Europe
Flowers: July-September
Growth Duration: Annual
Myosotis arvensisfield forget-me-not, field scorpion-grass, 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
Growth Duration: Annual
Myosotis discoloryellow and blue forget-me-not, yellow and blue scorpiongrass
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, east to Montana and Nevada; also in eastern North America.
Habitat: Roadsides, fields, wastelots, and other dry to moist open areas.
Origin: Introduced from Europe
Flowers: April-August
Growth Duration: Annual
Myosotis laxabay forget-me-not, small forget-me-not
Distribution: Occurring on both sides of the Cascades crest in Washington; British Colombia 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
Growth Duration: Annual, Biennial, Perennial
Myosotis ramosissimaearly forget-me-not
Distribution: Occurring in the Columbia River Gorge in Washington; also in eastern North America.
Habitat: Balds, prairies, grassy embankments, roadsides, and other disturbed open places at low elevations.
Origin: Introduced from Europe and Mediterranean region
Flowers: March-May
Growth Duration: Annual
Myosotis scorpioidescommon forget-me-not, true forget-me-not, water forget-me-not
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east across most of North America to the Atlantic Coast.
Habitat: Wet areas from low to middle elevations in the mountains.
Origin: Introduced from Eurasia
Flowers: June-August
Growth Duration: Perennial
Myosotis strictablue scorpiongrass
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across much of North America to the Atlantic Coast.
Habitat: Balds, prairies, roadsides, wastelots, and other disturbed, open moist to dry places.
Origin: Introduced from Eurasia
Flowers: April-June
Growth Duration: Annual
Myosotis sylvaticawoodland forget-me-not
Distribution: Occurring chiefly west of the Cascades crest in Washington; southern British Columbia to Oregon.
Habitat: Roadsides and moist woods at low elevations.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Perennial
Myosotis vernaearly forget-me-not, spring forget-me-not, early scorpion-grass, spring scorpion-grass
Distribution: Occurring on both sides of the Cascades crest in Washington British Columbia to California, east to the Atlantic Coast.
Habitat: Open, wet to dry places in foothills and lowlands.
Origin: Native
Flowers: May-July
Growth Duration: Annual, Biennial
Myosoton aquaticumgiant chickweed, water chickweed
Distribution: Occurring east of the Cascades crest in southeastern Washington; British Columbia to Oregon, east to Idaho and Montana; also in central and eastern North America.
Habitat: Stream banks, woods, marshes and wet meadows.
Origin: Introduced from Europe
Flowers: June-October
Growth Duration: Perennial
Myosurus ×alopecuroideshybrid mouse-tail
Distribution: Occurring east of the Cascades crest in Washington; eastern Washington to California, east to Elmore County, Idaho.
Habitat: Verrnal pools and alkali flats in sagebrush desert.
Origin: Native
Flowers: March-May
Growth Duration: Annual
Myosurus apetalusbristly mouse-tail, sedge mouse-tail
Distribution: Occurring east of the Cascades crest in Washington; 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: March-June
Growth Duration: Annual
var. borealis – sedge mouse-tail
Myosurus minimustiny mouse-tail
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia 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
Growth Duration: Annual
Myosurus sessilisshor-tstemmed mouse-tail, vernal pool mouse-tail
Distribution: Occurring east of the Cascades crest in Washington, where known from Klickitat County in Washington; South-central Washington to north-central Oregon, also in central California.
Habitat: Vernal pools.
Origin: Native
Flowers: April-June
Growth Duration: Annual
Myrica galesweetgale
Distribution: Occurring west of the Cascades crest in Washington; Alaska to Oregon, east across Canada to the Great Lakes region and northeastern North America.
Habitat: Coastal bogs, swamps, lakes, and streams.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Myriophyllum aquaticumparrot's feather, water feather, South American water milfoil
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California and Idaho, east across the southwest to central and eastern North America.
Habitat: Ponds and slow-moving streams.
Origin: Introduced from South America
Flowers: May-July
Growth Duration: Perennial
Myriophyllum heterophyllumtwo-leaf milfoil, various-leaved water-milfoil
Distribution: Occurring west of the Cascades crest, where known only from the Puget Sound lowlands; British Columbia to Washington, native from Texas to central and eastern North America.
Habitat: Lakes and ponds.
Origin: Introduced from central and eastern North America
Flowers: May-October
Growth Duration: Perennial
Myriophyllum hippuroideswestern milfoil, western water milfoil
Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; British Columbia to California; introduced in Illinois.
Habitat: Ponds and slow-moving streams.
Origin: Native
Flowers: May-October
Growth Duration: Perennial
Myriophyllum pinnatumcutleaf water-milfoil
Distribution: Occurring west of the Cascades crest in Washington, where known 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
Growth Duration: Perennial
Myriophyllum quitenseAndean water milfoil, waterwort water milfoil
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to California, east to Montana, Wyoming, Utah, and Arizona, also in northeastern North America.
Habitat: Ponds and slow-moving streams.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Myriophyllum sibiricumAmerican milfoil, northern milfoil, Siberian water milfoil
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Ponds and quiet streams, often in brackish water.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Myriophyllum sibiricum × Myriophyllum spicatumhybrid Eurasian milfoil
Distribution: Occurring on both sides of the Cascades crest in Washington; expected to occur wherever the two species co-occur.
Habitat: Ponds and quiet streams, including brackish water.
Origin: Introduced
Flowers: June-August
Growth Duration: Perennial
Myriophyllum spicatumEurasian water milfoil, spiked water milfoil
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.
Habitat: Ponds, lakes, and quiet streams.
Origin: Introduced from Eurasia
Flowers: April-October
Growth Duration: Perennial
Myriophyllum ussurienseterrestrial water milfoil, Ussurian milfoil
Distribution: Occurring west of the Cascades crest in Washington, where known only from Wahkiakum County. British Columbia to Oregon; also in Eurasia.
Habitat: Freshwater intertidal zone on mudflats. British Columbia south to Oregon; circumboreal.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Myriophyllum verticillatumverticillate milfoil, whorled water milfoil
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across most of North America to the Atlantic Coast except in the southeastern U.S.
Habitat: Aquatic habitats below the water surface.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Myriopteris gracilisFee's lace-fern, slender lace-fern, Fee's lip fern
Distribution: Occurring east of the Cascades crest in southeastern Washington; British Columbia to California, east to the midwestern U.S.
Habitat: Cliff crevices, especially on limestone, foothills to middle elevations in the mountains.
Origin: Native
Growth Duration: Perennial
Myriopteris gracillimalace lip fern
Distribution: Occurring on both sides of the Cascades crest and in the Olympic Mountains in Washington; southern British Columbia to California, east to western Montana, Idaho, Nevada and Utah.
Habitat: Cliffs and rocky slopes from middle elevations to alpine.
Origin: Native
Spores: May-September
Growth Duration: Perennial