Flora of North America species comparison

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Ulmus crassifolia

cedar elm
Habit Trees, 24-27 m; crowns rounded to narrow.
Bark

light brown with shallow ridges and large plates.
Branches

often with opposite corky wings;

twigs reddish brown, pubescent.
Buds

brown, apex acute, pubescent;

scales dark brown, shiny, glabrous.
Leaves

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.
Seeds

somewhat thickened, not inflated.
Wood

hard.
Samaras

green to tan, elliptic to oval, ca. 0.75-1 cm, pubescent, margins ciliate, cilia ca. 0.5 mm.
2n

= 28.

Ulmus crassifolia
Phenology Flowering late summer–early fall.
Habitat Stream banks, low woods, low hillsides, roadsides, waste places, sometimes shade trees
Elevation 0-500 m (0-1600 ft)
Distribution
from FNA
AR; FL; LA; MS; OK; TN; TX; n Mexico
[WildflowerSearch map]
[BONAP county map]
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.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 3.
Parent taxa Ulmaceae > Ulmus
Sibling taxa
U. alata, U. americana, U. glabra, U. parvifolia, U. procera, U. pumila, U. rubra, U. serotina, U. thomasii
Name authority Nuttall: Trans. Amer. Philos. Soc., n.s. 5: 169. (1837)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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