Butterfly milkweed.

Common Names
Butterfly milkweed, butterfly weed, Canada root, chigger flower, fluxroot, Indian nosy, orange apocynum, orange milkweed, orangeroot, orange swallow-wort, pleurisy root, rubber root, silkweed, swallow-wort, tuberous-rooted swallow-wort, tuber root, white root, wind root, wind weed, wine tree.

Description
A very leafy, slightly hairy perennial that grows to 2 to 3 feet in height. Leaves are 2 to 6 inches long, narrow, alternate, and short petioled. Orange-yellow flowers are in umbels. Fruit is a pod. Seeds have white silky hairs.

Flowering Period
May to August.

Habitat
Sandy, dry open soils, pastures, and roadsides.

Harvest
Roots in fall.

Uses
The plant has been used as an expectorant, diaphoretic, and emetic, and to treat rheumatism. Indians of Appalachia made a tea of the leaves to induce vomiting.