Malvaceae
Mallow Family
10 genera
24 species
2 subspecies and varieties
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Abutilon theophrastivelvetleaf
Distribution: Both sides of the Cascades in Washington; introduced noxious weed, common in eastern United States, uncommon in the Pacific Northwest.
Habitat: Rich, moist soils in gardens, cultivated fields and waste areas.
Origin: Introduced
Flowers: July-August
Alcea roseahollyhock
Distribution: In a few scattered locations in Washington; widely distributed throughout much of North America.
Habitat: Garden escape establishing in disturbed areas.
Origin: Introduced
Flowers: May-August
Gossypium hirsutumcotton
Origin: Introduced
Hibiscus moscheutoscrimsoneyed rosemallow
Distribution: Sporadic in central Washington; native to eastern North America
Habitat: Moist areas along edge of ponds and lakes.
Origin: Introduced
Flowers: July-August
Hibiscus trionumflower-of-an-hour
Distribution: Scattered locations east of the Cascades in Washington; widely distributed througout much of North America.
Habitat: Garden escape in disturbed areas.
Origin: Introduced
Flowers: June-July
Iliamna longisepalalong-sepal globemallow
Distribution: Kittitas County to Chelan and Douglas counties in Washington; endemic to Washington.
Habitat: From sagebrush to ponderosa pine areas at low elevations.
Origin: Native
Flowers: June-August
Iliamna rivularisstreambank globemallow
Distribution: East of the Cascades in Washington; British Columbia south to Oregon, east to Montana and Colorado.
Habitat: Somewhat moist areas, foothills to forest openings at mid-elevations.
Origin: Native
Flowers: June-August
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
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: Along the coast in Washington; Vancouver Island south to the mouth of the Umquah River 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: East of the Cascades in Washington; south-central Washington to central Idaho, south to Utah and Nevada.
Habitat: Open desert to the lower levels of the mountains.
Origin: Native
Flowers: June-July
Sphaeralcea munroanaMunro's globemallow, white-stemmed globemallow
Distribution: Widely distributed east of the Cascades in Washington; southeast British Columbia and Montana, south to California.
Habitat: Desert plains to open lower mountain slopes.
Origin: Native
Flowers: May-August
Tilia cordatasmall-leaved linden
Origin: Introduced
Tilia platyphyllos
Origin: Introduced