Conyza canadensis (formerly Erigeron canadensis L.) is an annual plant native throughout most of North America and Central America. Common names include Horseweed, Canadian Horseweed, Canadian Fleabane, Coltstail, Marestail and Butterweed.
You can copy this taxon into another guide. If you are one of the
editors of this guide it should copy everything, but if you're not, it
will only copy the licensed content.