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Horseweed, Erigeron canadensisHorseweed, butterweed or Canada fleabane, Erigeron canadensis (Erigeron canadense). Handcoloured lithograph by Hanhart after a botanical illustration by David Blair from Robert Bentley
Collinsonia canadensis, horse weedA hand written description of horse weed from Flora Nov Eboracensis, part of the the Banks Collection. Held in the Botany Library at the Natural History Museum, London