The swamp milkweed (Asclepias incarnata) belongs to the Asclepiadaceae (the Milkweed family). It is a perennial herb that is native to North America. This herb grows in damp to wet soils and also is cultivated as a garden plant, and up to a height of 100-150 cm. The leaves are narrow lance-shaped, with a sharp point, and arranged in oppositely. The small, fragrant, pink to mauve flowers bloom in rounded umbels from early to mid-summer. They attract butterflies and other pollinators with nectar. Like most other milkweeds, it has sap containing toxic chemicals.