Spreading deciduous trees usually armed with large branched spines arising above the axils and persisting on the trunk. Twigs zigzag, roundish; pith rounded, continuous, pale or light pink. Buds glabrous, sessile, superposed, more or less covered by the torn margin of the leaf-scar; end-bud lacking. Leaf-scars alternate, relatively large, shield-shaped; bundle-traces 3; stipule-scars none. Fruit a large legume (to 4 dm. long).
Fig. 169. Gledirsia rriacanthos.
1. G. triacanthos L. Honey-Locust. A tree with a maximum height of 50 m., usually much smaller; bark on young trunks smooth and marked with large oblong conspicuous lenticels, on older trunks roughened by scattered shallow fissures and thick firm broad plates; trunk thickly beset with large branching thorns (thorns absent in f. inermis (Pursh) Schneid.). Rich woods, New York to South Dakota, south to Florida and Texas (Fig. 169).