herb, herbaceous plant - a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests

Asclepias, genus Asclepias - genus of chiefly North American perennial herbs: silkweed; milkweed

Asclepias albicans, white milkweed - tall herb with leafless waxy-white stems and whitish starlike flowers; southwestern United States

Asclepias curassavica, blood flower, swallowwort - tropical herb having orange-red flowers followed by pods suggesting a swallow with outspread wings; a weed throughout the tropics

Asclepias exaltata, poke milkweed - milkweed of the eastern United States with leaves resembling those of pokeweed

Asclepias incarnata, swamp milkweed - densely branching perennial of the eastern United States with white to crimson or purple flowers

Asclepia meadii, Asclepias meadii, Mead's milkweed - milkweed of central North America; a threatened species

Asclepias purpurascens, purple silkweed - perennial of eastern North America having pink-purple flowers

Asclepias speciosa, showy milkweed - milkweed of southern North America having large starry purple-pink flowers

Asclepias subverticillata, horsetail milkweed, poison milkweed - milkweed of southwestern United States and Mexico; poisonous to livestock

Asclepias tuberosa, butterfly weed, chigger flower, chiggerflower, Indian paintbrush, orange milkweed, pleurisy root, tuber root - erect perennial of eastern and southern United States having showy orange flowers

Asclepias verticillata, whorled milkweed - milkweed of the eastern United States with narrow leaves in whorls and greenish-white flowers