Noun butterweed has 2 senses
  1. butterweed, ragwort, Senecio glabellus - American ragwort with yellow flowers
    --1 is a kind of wildflower, wild flower
    --1 is a member of Senecio, genus Senecio
  2. butterweed - any of several yellow-flowered plants of the genus Packer; often placed in genus Senecio
    --2 is a kind of
    herb, herbaceous plant
    --2 is a member of Packera, genus Packera
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