Robinia pseudoacacia
Similarities of
Robinia pseudoacacia with the acacias:
Habitus of tree; Bark of older tree; Stipular spines; Smell of flowers; Form of leaves; type and form of fruit (see below).
Differences:
Flowers; Pinnate leaves (acacias have bipinnate leaves); Size and position of leaflets: big leaflets and apical leaflet (latter not found with acacia)