A medium sized tree, rarely reaching 60′ forming a broad, rounded, open crown.
Leaves: Opposite or whorled deciduous, simple, broadly ovate, 5″ to 6″ long, 4″ to 5″ wide, base is heart shaped, light green, paler and pubescent below, petioles, stout, 5″ to 6″ long.
Flowers: Perfect, irregular, many flowered panicles, 8″ to 10″ in length, individual flowers are 2″ wide, small glabrous, purplish calyx and white, 5 lobed corolla with yellow and purple blotches on inner surface.
Fruit: woody, linear, gray brown bean like capsule, 6″ to 20″ long.
Twigs: Stout brittle, at first greenish purple, becoming gray-brown with large pale lenticels, terminal buds, absent, lateral buds, globose, overlapping scales, leaf scars, oval, with a circle of 10 to 12 bundle scars.
Bark: Reddish brown or gray, thin with long, thin, irregular scales.