The Collaborative International Dictionary of English v.0.48:

Hevea \Hevea\ prop. n.
   A small genus of South American trees yielding latex. It
   includes the rubber tree, Hevea brasiliensis, originally
   found in South America, but now used for production of rubber
   world-wide.

   Syn: genus Hevea.
        [WordNet 1.5 +PJC]

The Collaborative International Dictionary of English v.0.48:

Par'a rubber \Par['a] rubber\
   The caoutchouc obtained from the South American
   euphorbiaceous tree Hevea brasiliensis, hence called the
   Par['a] rubber tree, from the Brazilian river and seaport
   named Par['a]; also, the similar product of other species of
   Hevea. It is usually exported in flat round cakes, and is a
   chief variety of commercial India rubber.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

Hevea brasiliensis
    n 1: deciduous tree of the Amazon and Orinoco Rivers having
         leathery leaves and fragrant yellow-white flowers; it
         yields a milky juice that is the chief source of commercial
         rubber [syn: Para rubber tree, caoutchouc tree, Hevea
         brasiliensis]