The Collaborative International Dictionary of English v.0.48:

Darlingtonia \Dar`ling*to"ni*a\, n. [NL. Named after Dr. William
   Darlington, a botanist of West Chester, Penn.] (Bot.)
   A genus of California pitcher plants consisting of a single
   species. The long tubular leaves are hooded at the top, and
   frequently contain many insects drowned in the secretion of
   the leaves.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Darlingtonia
    n 1: one species: California pitcher plant [syn: Darlingtonia,
         genus Darlingtonia]