1. ragwort, tansy ragwort, ragweed, benweed, Senecio jacobaea, weed

usage: widespread European weed having yellow daisylike flowers; sometimes an obnoxious weed and toxic to cattle if consumed in quantity

2. butterweed, ragwort, Senecio glabellus, wildflower, wild flower

usage: American ragwort with yellow flowers

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See also: ragwort (Dictionary)