Definitions for: Ragweed

[n] any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma
[n] widespread European weed having yellow daisylike flowers; sometimes an obnoxious weed and toxic to cattle if consumed in quantity

Webster (1913) Definition: Rag"weed, n. (Bot.)
A common American composite weed ({Ambrosia
artemisi[ae]folia}) with finely divided leaves; hogweed.

Great ragweed, a coarse American herb (Ambrosia trifida),
with rough three-lobed opposite leaves.

Synonyms: ambrosia, benweed, bitterweed, ragwort, Senecio jacobaea, tansy ragwort

See Also: Ambrosia artemisiifolia, Ambrosia psilostachya, Ambrosia trifida, common ragweed, genus Ambrosia, genus Senecio, great ragweed, perennial ragweed, Senecio, weed, western ragweed

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