Noun ragwort has 2 senses
  1. ragwort, tansy ragwort, ragweed, benweed, Senecio jacobaea - widespread European weed having yellow daisylike flowers; sometimes an obnoxious weed and toxic to cattle if consumed in quantity
    --1 is a kind of weed
    --1 is a member of Senecio, genus Senecio
  2. butterweed, ragwort, Senecio glabellus - American ragwort with yellow flowers
    --2 is a kind of wildflower, wild flower
    --2 is a member of Senecio, genus Senecio
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