Milkweed (Asclepias spp. )
Perennial, with milky sap. Leaves opposite or whorled, often pubescent. Clusters of pink to white, fragrant flowers with reflexed petals and 5-part crown. Fruit an elongate pod filled with silky-plumed seeds. Leaves are essential food for monarch butterfly caterpillars. Named after Asklepios, Greek god of medicine. Prairies, old fields, ditches. Blooms June-August.