This tree has proven to be quite urban-tolerant and is common in the inner cities of the south. It reseeds itself readily in disturbed urban sites where it is not winterkilled. Leaves are usually entire but may be three-lobed on vigorous plants. Leaves are broad and heart-shaped, and they gradually taper to a point. The leaf base is cordate.
Twigs are olive brown in color, pubescent, stout, and heavily lenticeled.
Pith is chambered or sometimes hollow. Catalpa has similar foliage but has continuous pith. Flower buds are borne in terminal panicles and are conspicuous through the winter. The flower buds make an excellent identification feature. Flowers are purple and fragrant.