Flora of the Southeastern United States
2022 Edition


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Erigeron canadensis Linnaeus. Common Horseweed. Phen: Jun-Nov. Hab: Old fields, disturbed areas, roadsides, gardens. Dist: S. Canada south through nearly all of the United States to tropical America.

Origin/Endemic status: Native

Syn: = F; = Conyza canadensis var. canadensis – C, G, GrPl, Mo2, NcTx, Oh3, Pa, SE1, Va, W; = Erigeron canadensis var. canadensis – NY, RAB; = Leptilon canadense – S; < Conyza canadensis – Ar, Fl7, FNA20, Il, K2, Mi, NE, Tn, WH3; > Conyza canadensis var. canadensis – Tx; > Conyza canadensis var. glabrata – GrPl, Tx; < Erigeron canadensis – K3, K4, WV

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image of plant© Gary P. Fleming [image randomly selected]
image of plant© Erik Danielson [image randomly selected] source
image of plant© Joey Shaw [image randomly selected] source