Robinia spp.
(Robinia) is in the Leguminosae family. It is native to central and eastern
United States, but has become naturalized throughout North America. The
two-tone version I see in Dublin is most likely a cultivar. The tree is
deciduous, and diagnostics include an open, upright oval canopy with upward reaching
branches. Leaves are slightly alternate, pinnately-compound, 12-18” long with
17-21 paired, ovate-oblong 1-2” long leaflets along the main rib. Flowers are pea-like
with a light fragrance, dark purple to pink, and hang in clusters. Legume seed
pods are interspersed among the leaves. Bark is reddish brown to gray, with
fissures and cracks with rounded scaly ridges.
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| Leaves and flowers - form and habit. |
This tree tolerates heat and some drought. The wood is
brittle, and I have observed limb breakage, and even a tree split for no
obvious reason. It does reseed easily, which requires maintenance to control.
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