Malvaceae
Mallow Family
10 genera
19 species
2 subspecies and varieties
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Abutilon theophrastivelvetleaf
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Roadsides, fields, wastelots, and other disturbed open places.
Origin: Introduced from Eurasia
Flowers: July-August
Gossypium hirsutumcotton
Origin: Introduced
Iliamna longisepalalong-sepal globemallow
Distribution: Occurring east of the Cascades crest in Washington, where endemic to Chelan and Douglas counties.
Habitat: From sagebrush desert to ponderosa pine forest openings at low elevations.
Origin: Native
Flowers: June-August
Iliamna rivularisstreambank globemallow
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon, east to Montana and Colorado.
Habitat: Somewhat moist areas, often along seasonal stream banks, foothills to forest openings at mid-elevations.
Origin: Native
Flowers: June-August
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
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
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
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
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
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
Sidalcea campestrismeadow checker-mallow, meadow sidalcea
Distribution: Native only to the Willamette Valley area (Multnomah and Washington to Benton and Linn counties). Introduced as a garden plant in western Washington, but rarely persisting.
Habitat: Dry fields and roadsides.
Origin: Introduced
Flowers: May-July
Sidalcea hendersoniiHenderson's checker-mallow
Distribution: Occurring west of the Cascades crest in the coastal counties in Washington; southwestern British Columbia to the Umpqua River area in Oregon.
Habitat: On or adjacent to tidelands, coastal marshes.
Origin: Native
Flowers: June-August
Sidalcea hirtipesbristly-stem checker-mallow
Distribution: Clark and Lewis counties in Washington; south to Lincoln, Tillamook and Clatsop Counties, Oregon.
Habitat: Coastal mountains to bluffs along the ocean, but not on tideflats.
Origin: Native
Flowers: June-July
Sidalcea nelsonianaNelson's checker-mallow
Distribution: Occurring in southwest Washington; south in Willamette Valley of Oregon from Portland to Salem, west to Tillamook County.
Habitat: Gravelly, well-drained soil at low elevations.
Origin: Native
Flowers: May-July
Sidalcea oreganaOregon checker-mallow
Distribution: Chiefly east of the Cascades in Washington; Washington south to California, east to Wyoming.
Habitat: Sagebrush plains, meadows and ponderosa pine forests.
Origin: Native
Flowers: May-July
var. calva – Oregon checkermallow
var. oregana – Oregon checkermallow
Sidalcea virgatavirgate checkerbloom
Distribution: Known only from Thurston County in Washington; Thurston County, WA and then Yamhill County, Oregon south along West Cascades to California.
Habitat: Moist prairies and meadows at low elevations.
Origin: Native
Flowers: April-June
Sphaeralcea grossulariifoliagooseberry-leaved globemallow
Distribution: Occurring east of the Cascades crest in Washington; south-central Washington to Nevada, east to southern Idaho and Utah.
Habitat: Sagebrush desert to low elevations in the mountains.
Origin: Native
Flowers: May-July
Sphaeralcea munroanaMunro's globemallow, white-stemmed globemallow
Distribution: Widely distributed east of the Cascades crest in Washington; south-central British Columbia to California, east to Montana, Wyoming, and Colorado.
Habitat: Desert plains to open lower mountain slopes.
Origin: Native
Flowers: May-August
Tilia cordatasmall-leaved linden
Origin: Introduced