Milkweed, Asclepias, is a genus of herbaceous, perennial, flowering plants named for their milky latex sap. Milkweed may also refer to: Plants Euphorbia heterophylla, native to the Americas Euphorbia peplus, native to most of Europe, northern Africa, and western Asia Other uses Milkweed (novel), a children's novel by Jerry Spinelli Milkweed Editions, an independent publishing company based in Minneapolis, Minnesota Monarch butterfly (Danaus plexippus), also known as the milkweed See also List of plants known as milk thistle