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Any of various plants in the composite family, chiefly of the genera Senecio and Packera, having yellow flower heads. S. jacobaea, a European species poisonous to livestock, is widely naturalized in North America and elsewhere.
[From the ragged shape of its leaves.]
(Plants) any of several plants of the genus Senecio, esp S. jacobaea of Europe, that have yellow daisy-like flowers: family Asteraceae (composites). See also groundsel1
any of various composite plants of the genus Senecio, usu. bearing yellow, slender-rayed flower heads.
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|Noun||1.||ragwort - widespread European weed having yellow daisylike flowers; sometimes an obnoxious weed and toxic to cattle if consumed in quantity|
genus Senecio, Senecio - enormous and diverse cosmopolitan genus of trees and shrubs and vines and herbs including many weeds
weed - any plant that crowds out cultivated plants
|2.||ragwort - American ragwort with yellow flowers|