Stems erect, herbaceous, 2 to 4 feet high, from a perennial root, usually branched, glabrous or slightly pubescent. Stipules small, one-eighth to one-fourth of an inch long, entire or toothed. Leaves sessile or nearly so, three-foliate; leaflets oval, ovate, lanceolate or slightly obovate, long pointed at the apex, narrowed at the base, 2 to 3 inches long, irregularly toothed. Flowers white or pinkish, one-half to two-thirds of an inch long on slender peduncles, in loose, terminal, leafy panicles; calyx reddish, five-toothed, ten nerved; petals five, linear-lanceolate, somewhat unequal.
In woods and thickets, Ontario and New York to Michigan, Georgia and Missouri. Flowers in June and July.
A closely related species, Porteranthus stipulatus (Muhlenberg) Britton, has incised leaflets, broad, foliaceous, incised stipules and slightly smaller flowers. Its range is about the same.
Memoir 15 N. Y. State Museum
Indian Physic; Bowman S Root - Porteranthus trifoliatus