Ulmus crassifolia
Trans. Amer. Philos. Soc., n.s. 5: 169. 1837.
Trees, 24-27 m; crowns rounded to narrow. Bark light-brown with shallow ridges and large plates. Wood hard. Branches often with opposite corky wings; twigs reddish-brown, pubescent. Buds brown, apex acute, pubescent; scales dark-brown, shiny, glabrous. Leaves: petiole ca. 1.5 mm, pubescent. Leaf-blade ovate to elliptic, 2.5-5 × 1.3-2 cm, base oblique or rounded to cuneate, margins crenate to doubly serrate, apex obtuse; surfaces abaxially softly pubescent, adaxially harshly pubescent. Inflorescences fascicles, 2-5-flowered, 0.5 cm; pedicel 0.75-1 cm. Flowers: calyx deeply lobed, more than 1/2 its length, lobes 6-9, hairy; stamens 5-6, anthers reddish purple; stigmas white, pubescent, exserted and spreading. Samaras green to tan, elliptic to oval, ca. 0.75-1 cm, pubescent, margins ciliate, cilia ca. 0.5 mm. Seeds somewhat thickened, not inflated. 2n = 28.
Phenology: Flowering late summer–early fall.
Habitat: Stream banks, low woods, low hillsides, roadsides, waste places, sometimes shade trees
Elevation: 0-500 m
Distribution
Ark., Fla., La., Miss., Okla., Tenn., Tex., n Mexico
Discussion
Except for the Suwanee River valley in Florida, Ulmus crassifolia has not been found east of Webster County, Mississippi. It hybridizes with U. serotina.
Selected References
None.
Lower Taxa
"/" is not declared as a valid unit of measurement for this property.