Butterfly-weed/ Pleurisy Root
 

Asclepias tuberosa
This very showy 1-2 1/2' plant has a rather thick, rough stem with branches toward the top. The alternate sessile leaves are oval. The sap is not milky like most other milkweeds. The 3/8" bright orange flowers are in several umbels that together form a rather flat-topped cluster. Blooms June-September in fields, roadsides, woodland openings.

The roots were once thought to be helpful in diseases of the lung; hence the name "Pleurisy root".