Asclepias quadrifolia is a species of milkweed commonly called fourleaf milkweed or whorled milkweed. The plant occurs in the eastern United States and Canada.
Fourleaf milkweed is a perennial herb from a fleshy rhizome. The plant is small and slender compared to other milkweeds at only 45 cm tall. Leaves usually elliptic to ovate, opposite in arrangement but clustered to form a false whorl, 2.5-12.0 cm long, 1–6 cm wide. Pale pink to white flowers are borne in rounded, usually pendulous clusters ...