Missouri Plants Milkweed Vine   (Cynanchum laeve) Tracheophyta: Angiosperm: Dicot: Milkweed (Asclepiadaceae) Native North American plant Habitat: any full sun area. ID Features: heart-shaped leaves with seed pods. Natural History: Milkweed is commonly found in upland fields, prairies, glades, roadsides, and edges of woods. Its flowers are pink to lilac and born terminally at the ends of branches. Its leaves are broadly elliptical. All of its parts are poisonous but its leaves are eaten by the caterpillar of the Monarch butterfly.

The information is from: Missouri Wildflowers by Edgar Denison, 5th Edition, Missouri Department of Conservation, ©1998.