The Collaborative International Dictionary of English v.0.48:

Garcinia \Gar*cin"i*a\, n. [NL.] (Bot.)
   A genus of plants, including the mangosteen tree (Garcinia
   Mangostana), found in the islands of the Indian Archipelago;
   -- so called in honor of Dr. Garcin.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Garcinia
    n 1: evergreen trees and shrubs: mangosteens [syn: Garcinia,
         genus Garcinia]