Zanthoxylum clava-herculis is a shrub or small tree, 3-15 m tall, trunks with large, broad-based prickles and corky knobs.
Leaves alternate, pinnate, leaflets 5-19, lance-shaped, sides unequal.
Flowers yellow-green, sexes separate; in large, branched clusters.
Fruit 0.5 cm, pitted.
Wetland status: NL.
Frequency in NYC: Very infrequent.
Origin: Delaware and south.
Habitat: Overgrown horticultural specimen.