Erigeron canadensis er-IJ-er-on, ka-na-DEN-sis is an annual found natively throughout most of Central and North America.It belongs to the family Asteraceae and the large Erigeron plant genus.Erigeron canadensis goes by several common names:HorseweedCanadian horseweedCanadian fleabaneColt’s tailMare’s tailButterweedPeople sometimes mistake the large flowers of Erigeron plants for daisies or asters.
