1b. var. glabra

A. glabra var. leucodermis Sarg.

A. glabra f. pallida (Willd.) Fernald

Plants usually medium to large trees to 20 m tall, rarely shorter trees or shrubs. Leaflets 5–7, 6–16 cm long, (2–)3–6(–8) cm wide, mostly obovate to elliptic. 2n=40. April–May.

Scattered to common nearly throughout the state, but apparently absent from most of the Mississippi Lowlands Division (eastern U.S. west to Minnesota, Kansas, and Texas; Canada). Banks of streams and rivers, bottomland forests, mesic upland forests, and bases of bluffs; also margins of pastures and old fields.