RAGWORT

butterweed, ragwort, Senecio glabellus

(noun) American ragwort with yellow flowers

ragwort, tansy ragwort, ragweed, benweed, Senecio jacobaea

(noun) widespread European weed having yellow daisylike flowers; sometimes an obnoxious weed and toxic to cattle if consumed in quantity

Source: WordNet® 3.1

Etymology

Noun

ragwort (countable and uncountable, plural ragworts)

Any of a number of wild flowering plants with yellow flowers in the family Asteraceae, mostly belonging to Senecio and related genera.

Source: Wiktionary

Rag"wort`, n. (Bot.)

Definition: A name given to several species of the composite genus Senecio.

Note: Senecio aureus is the golden ragwort of the United States: S. elegans is the purple ragwort of South Africa.

Source: Webster’s Unabridged Dictionary 1913 Edition