The Collaborative International Dictionary of English v.0.48:

Camassia \Camassia\ n.
   a genus of scapose herbs of North and South America having
   large edible bulbs.

   Syn: genus Camassia, Quamassia, genus Quamassia.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Camassia
    n 1: genus of scapose herbs of North and South America having
         large edible bulbs [syn: Camassia, genus Camassia,
         Quamassia, genus Quamassia]