bugseed, tickseed
6 species
2 subspecies and varieties
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Scientific name
Common name
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Corispermum americanumAmerican 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
var. americanum – American bugseed
Corispermum hookeriHooker's bugseed
Origin: Native
var. pseudodeclinatum – Hooker's bugseed
Corispermum pacificumPacific bugseed
Distribution: Occurring along the Lower Columbia River and east of the Cascades in Washington; central Washington south to northern Oregon, e to western Idaho.
Habitat: Roadsides and waste places.
Origin: Native
Flowers: August-October
Growth Duration: annual
Corispermum pallasiiPallas' bugseed
Origin: Introduced
Corispermum pallidumpale bugseed
Origin: Native
Growth Duration: annual
Corispermum villosumhairy bugseed
Origin: Native