Any of several kinds of fleabane (genus Erigeron); especially E. pulchellus, which has white to mauve daisy-like flowers and is found in southern and eastern areas of the United States.
Origin
Mid 18th century.
Definition of robin's plantain in US English:
robin's plantain
noun
North American
Any of several kinds of fleabane (genus Erigeron); especially E. pulchellus, which has white to mauve daisy-like flowers and is found in southern and eastern areas of the United States.