The Collaborative International Dictionary of English v.0.48:

Gentiana \Gentiana\ prop. n.
   The type genus of the Gentianaceae; it is a genus of herbs
   nearly cosmopolitan in cool temperate regions; in some
   classifications it includes the genera Gentianopsis and
   Gentianella.

   Syn: genus Gentiana.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Gentiana
    n 1: type genus of the Gentianaceae; cosmopolitan genus of herbs
         nearly cosmopolitan in cool temperate regions; in some
         classifications includes genera Gentianopsis and
         Gentianella [syn: Gentiana, genus Gentiana]