Robinia pseudoacacia 'Unifoliola'

Free-flowering. Leaflets few, 1, 2 or 3, often the enlarged terminal leaflet only. Originated in a French nsy, c. 1855.

kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Rosanae
order      Fabales
family       Fabaceae
genus        Robinia L.
species         Robinia pseudoacacia L.