The large, bright, terminal blossoms of this showy, 2-4 ft. perennial are made up of fragrant, small, rose-purple flowers. Deep pink flowers clustered at the top of a tall, branching stem, bearing numerous narrow, lanceolate leaves. Opposite, narrow, lance-shaped leaves line the erect, open-branched stem. Elongated, tan-brown seed pods persist into winter. Like all members of the Asclepias genus, this milkweed is often used by monarch butterflies as a host plant.