butterweed

from WordNet (r) 3.0 (2006)

butterweed
    n 1: American ragwort with yellow flowers [syn: {butterweed},
         {ragwort}, {Senecio glabellus}]
    2: any of several yellow-flowered plants of the genus Packera;
       often placed in genus Senecio

from The Collaborative International Dictionary of English v.0.48

Butterweed \But"ter*weed`\, n. (Bot.)
   An annual composite plant of the Mississippi valley ({Senecio
   lobatus}).
   [1913 Webster]

[email protected]