What does milkweed mean?
Milkweed is the common name for a group of flowering plants, especially members of the genus Asclepias in the dogbane family. These plants are recognizable by their clustered flowers and, in many species, elongated seed pods filled with seeds bearing tufts of white silk. The name refers to the milky latex that oozes from a broken stem. In North American gardens and meadows, milkweed is closely associated with monarch butterflies because their caterpillars feed on it, although the plants also support many other insects. Gardeners value milkweeds for native-plant gardens and pollinator habitat, while some species spread readily through underground rhizomes. The word does not identify one species: the familiar orange-flowered butterfly weed and the pink-flowered common milkweed are distinct members of the group. In ecological writing, milkweed can refer both to the plants themselves and to the habitat they create. Its ordinary appearance, distinctive sap, and importance to insect life make it a familiar word with unusually broad natural and cultural significance.
nounAny of various flowering plants in the dogbane family, especially those in the genus Asclepias, that exude a milky latex. Many have clusters of small flowers and pods containing seeds with silky tufts.
- Any of various flowering plants, especially those in the genus Asclepias, having milky latex, clustered flowers, and often pods filled with silky seeds.
"Milkweed grew along the fence, providing food for a family of monarch caterpillars."
"The gardener planted milkweed to create habitat for monarch butterflies."
"A natural history class examined the unusual seed pods of milkweed."
Use the plural for multiple individual plants or groups of milkweed.
"Several milkweeds grew beside the path."
A patch of milkweed can be a vital fuel stop for monarch caterpillars and a banquet for a remarkable range of other insects.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does milkweed come from?
Milkweed is an English compound formed from milk and weed, referring to the plants' milky sap; the compound is attested from the early 17th century. Milk comes from Old English milc and is related to words such as Dutch melk and German Milch, while weed descends from Old English wēod, meaning a herb or plant. The two elements therefore combine the plant's appearance as vegetation with its characteristic milky sap.
Related word forms
How milkweed is actually used
The term is neutral and common in botanical, gardening, and conservation contexts. It usually refers to members of Asclepias, although some related plants are also called milkweeds.
Easily confused with milkweed
Milkweed is a flowering plant with milky sap, whereas milkwood is a tree whose wood may be used for furniture or other products.