Sidalcea
checker-mallow, sidalcea
6 species
2 subspecies and varieties
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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