Conyza
conyza, horseweed
2 species
1 subspecies and varieties
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Conyza bonariensisSouth American conyza
Distribution: Occurring west of the Cascades crest in lowland western Washington; Washington to California, eastward in the southern U.S. to the Atlantic Coast.
Habitat: Roadsides, fields, wastelots, and disturbed open areas at low elevations.
Origin: Introduced from South America
Flowers: June-August
Conyza canadensisCanadian fleabane, horseweed
Distribution: Widely distributed on both sides of the Cascades crest in Washington; British Columbia to California, east to the Atlantic Coast.
Habitat: Roadsides, fields, balds, prairies, ditches, wastelots, and other disturbed, open areas at low elevations.
Origin: Native
Flowers: July-September