Checklist » Asteraceae » Conyza canadensis
Last updated 2/27/2008 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: BC & Kz99 do not lump, Chambers and Sundberg (2000) do.

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