The Collaborative International Dictionary of English v.0.48:

Castanopsis \Castanopsis\ n.
   a genus of evergreen trees and shrubs of warm regions valued
   for their foliage; found in southeastern U.S. and eastern
   Australia and northern New Zealand.

   Syn: genus Castanopsis.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Castanopsis
    n 1: evergreen trees and shrubs of warm regions valued for their
         foliage; southeastern United States and eastern Australia
         and northern New Zealand [syn: Castanopsis, genus
         Castanopsis]