The Collaborative International Dictionary of English v.0.48:

Robinia \Ro*bin"i*a\, n. [NL. So called after Jean Robin, a
   French herbalist.] (Bot.)
   A genus of leguminous trees including the common locust of
   North America (Robinia Pseudocacia).
   [1913 Webster]

WordNet (r) 3.0 (2006):

Robinia
    n 1: deciduous flowering trees and shrubs [syn: Robinia,
         genus Robinia]