The Collaborative International Dictionary of English v.0.48:

Packera \Packera\ prop. n.
   A genus of American or East Asian perennial herbs with yellow
   to orange or red flower rays; it is sometimes included in
   genus Senecio.

   Syn: genus Packera.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Packera
    n 1: genus of American of east Asian perennial herbs with yellow
         to orange or red flower rays; sometimes included in genus
         Senecio [syn: Packera, genus Packera]