A Checklist of the Vascular Plants of Washington State
Hosted by the University of Washington Herbarium, Burke Museum
Hosted by the University of Washington Herbarium, Burke Museum
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Asteraceae » Conyza canadensis
Last updated 7/9/2020 by David Giblin.
Conyza canadensis (L.) Cronquist[FNA20, HC, HC2]
Canadian fleabane, horseweed
Publication: Bull. Torrey Bot. Club. 70: 632. 1943.
Origin: Native
selected vouchers: WTU
Notes: FNA20:"Conyza canadensis is thought to be native to North America and is now widely adventive, e.g., in South America, Europe, Asia, and Africa. Plants with stems glabrous and phyllaries red-tipped are sometimes treated as var. pusilla; similar plants with stems glabrous and phyllaries stramineous (not red-tipped) are sometimes treated as var. glabrata."
References: (none)
Synonyms & Misapplied Names:
Conyza canadensis (L.) Cronquist var. canadensis
Conyza canadensis (L.) Cronquist var. glabrata (A. Gray) Cronquist
