Asclepias tuberosa is a species of milkweed native to eastern North America. It is a perennial plant growing to 0.3–1 metre (1 ft 0 in–3 ft 3 in) tall, with clustered orange or yellow flowers from early summer to early autumn. The leaves are spirally arranged, lanceolate, 5–12 cm long, and 2–3 cm broad. This plant favors dry, sand or gravel soil, but has also been reported on stream margins. It requires full sun. Use of the plant is contraindicated in pregnancy, during lactation or with infants due to the small amount of cardiac glycosides.