From China. Grows fast to 40–90 ft. tall and 30–50 ft. wide, with heavy, wide-spreading limbs. Clearly shows its kinship to walnuts in its leaves: 8–16 in. long and divided into many finely toothed, oval leaflets.
Foot-long clusters of small, single-seeded, winged nuts hang from branches. Good looking but has only one real virtue: it succeeds well in compacted, poorly aerated soil in play yards and other high-traffic areas. Aggressive roots make it unsuitable in garden or lawn.
P. fraxinifolia, Caucasian wingnut, is similar but has slightly larger leaflets and longer nut clusters.