The Collaborative International Dictionary of English v.0.48:

Frasera \Frasera\ n.
   A genus of North American herbs: columbo; it includes some
   species sometimes placed in the genus Swertia.

   Syn: genus Frasera.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Frasera
    n 1: genus of North American herbs: columbo; includes some
         species sometimes placed in genus Swertia [syn: Frasera,
         genus Frasera]