Corispermum
bugseed, tickseed
6 species
2 subspecies and varieties
2 subspecies and varieties
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Corispermum americanum – American bugseed
Distribution: Occurring on both sides of the Cascades crest in Washington; southern British Columbia to California, east to the Atlantic Coast.
Habitat: Sandy, open sites, including shorelines, fields and disturbed areas, from low to middle elevations.
Origin: Native
Flowers: July-September
Growth Duration: Annual
Distribution: Occurring on both sides of the Cascades crest in Washington; southern British Columbia to California, east to the Atlantic Coast.
Habitat: Sandy, open sites, including shorelines, fields and disturbed areas, from low to middle elevations.
Origin: Native
Flowers: July-September
Growth Duration: Annual
• var. americanum – American bugseed
Corispermum hookeri – Hooker's bugseed
Distribution: Occurring on both sides of the Cascades crest in Washington; southeastern British Columbia to north-central Washington, east across Canada to Ontario.
Habitat: Sand dunes and sandy shores.
Origin: Native
Flowers: August-October
Growth Duration: Annual
Distribution: Occurring on both sides of the Cascades crest in Washington; southeastern British Columbia to north-central Washington, east across Canada to Ontario.
Habitat: Sand dunes and sandy shores.
Origin: Native
Flowers: August-October
Growth Duration: Annual
• var. pseudodeclinatum – Hooker's bugseed
Corispermum pacificum – Pacific bugseed
Distribution: Occurring along the Columbia River and east of the Cascades in Washington; southwestern Washington to northern Oregon, east to west-central Idaho; also in southwestern British Columbia.
Habitat: Dunes and sandy shorelines of desert areas and riverbanks.
Origin: Native
Flowers: August-October
Growth Duration: Annual
Distribution: Occurring along the Columbia River and east of the Cascades in Washington; southwestern Washington to northern Oregon, east to west-central Idaho; also in southwestern British Columbia.
Habitat: Dunes and sandy shorelines of desert areas and riverbanks.
Origin: Native
Flowers: August-October
Growth Duration: Annual
Corispermum pallasii – Pallas' bugseed
Distribution: Occurring on both sides of the Cascades crest in Washington; southwestern British Columbia to northwestern Oregon, east across Canada and the northern U.S. to the Atlantic Coast.
Habitat: Sand dunes, sandy and gravelly areas along streams and rivers, wastelots.
Origin: Introduced from Europe
Flowers: August-October
Growth Duration: Annual
Distribution: Occurring on both sides of the Cascades crest in Washington; southwestern British Columbia to northwestern Oregon, east across Canada and the northern U.S. to the Atlantic Coast.
Habitat: Sand dunes, sandy and gravelly areas along streams and rivers, wastelots.
Origin: Introduced from Europe
Flowers: August-October
Growth Duration: Annual
Corispermum pallidum – pale bugseed
Distribution: Occurring east of the Cascades, where historically endemic to central Washington; likely extinct.
Habitat: Sandy shorelines of streams and lakes.
Origin: Native
Flowers: August-October
Growth Duration: Annual
Distribution: Occurring east of the Cascades, where historically endemic to central Washington; likely extinct.
Habitat: Sandy shorelines of streams and lakes.
Origin: Native
Flowers: August-October
Growth Duration: Annual
Corispermum villosum – hairy bugseed
Distribution: Occurring east of the Cascades crest and west of the crest along the lower Columbia River in Washington; southern British Columbia to southern Oregon, east to the northern Rocky Mountain States, Great Plains, and Quebec.
Habitat: Sagebrush desert, often where alkaline.
Origin: Native
Flowers: August-October
Growth Duration: Annual
Distribution: Occurring east of the Cascades crest and west of the crest along the lower Columbia River in Washington; southern British Columbia to southern Oregon, east to the northern Rocky Mountain States, Great Plains, and Quebec.
Habitat: Sagebrush desert, often where alkaline.
Origin: Native
Flowers: August-October
Growth Duration: Annual
