conyza, horseweed
3 species
1 subspecies and varieties
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Conyza bonariensisSouth American conyza
Distribution: Introduced from Oregon through Arizona and Texas to Florida
Habitat: Occasionally escapes from cultivation
Origin: Introduced
Conyza canadensisCanadian fleabane, horseweed
Distribution: Common introduction throughout the United States and Canada
Habitat: Weed of roadsides, dry or moist disturbed ground
Origin: Native
Flowers: July - September
Conyza sumatrensisasthmaweed
Origin: Introduced