Ulmus parvifolia is a tree 15-25 m tall, trunks sometimes fluted, bark mottled, flaking, twigs slender, finely hairy; winter buds small, to 0.3 cm long; stipules linear, base narrow.
Leaves alternate, elliptic, 2-5 cm long, tip pointed, base unequal, smooth above, becoming leathery, margin toothed.
Flowers green, small, in axillary clusters; blooms Aug.-Sept.
Fruit dry, 1-seeded, elliptic to egg-shaped, about 1 cm long, notched at tip.
Wetland status: NL.
Frequency in NYC: Very infrequent.
Origin: N.E. Asia.
Habitat: Naturalized in horticultural sites, tolerates soil pH 4.8-7 (USDA, NRCS 2010). Notes: Apparently resistant to Dutch elm disease (Dirr 1990).