Ulmus crassifolia |
Ulmus parvifolia |
|
---|---|---|
cedar elm |
Chinese elm, lacebark elm, little-leaf elm, Siberian elm |
|
Habit | Trees, 24-27 m; crowns rounded to narrow. | Trees, 25 m; crowns rounded, open. |
Bark | light brown with shallow ridges and large plates. |
olive green to gray, shedding in irregular, tan to orange plates. |
Branches | often with opposite corky wings; twigs reddish brown, pubescent. |
long-pendulous, not winged; twigs tan to dark brown, glabrous to pubescent. |
Buds | brown, apex acute, pubescent; scales dark brown, shiny, glabrous. |
acute to obtuse; scales brown, pubescent. |
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. |
blade elliptic to ovate-obovate, (3.5-)4-5(-6) × 1.5-2.5 cm, base oblique, margins mostly singly serrate (some doubly serrate), apex acute; surfaces abaxially pale, glabrate, adaxially dark green, lustrous, glabrous; lateral veins forking 5 or more times per side. |
Inflorescences | fascicles, 2-5-flowered, 0.5 cm; pedicel 0.75-1 cm. |
fascicles, (2-)3-4(-8)-flowered; pedicel 8-10 mm. |
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. |
calyx reddish brown, deeply lobed, lobes (3-)4-5, glabrous; stamens 3-4; anthers reddish; stigma lobes white-pubescent, exserted, recurved and spreading with maturity. |
Seeds | somewhat thickened, not inflated. |
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. |
green to light brown, elliptic to ovate, ca. 1 cm, not winged, seeds nearly filling samara, notched at apex, glabrous. |
2n | = 28. |
= 28. |
Ulmus crassifolia |
Ulmus parvifolia |
|
Phenology | Flowering late summer–early fall. | Flowering late summer–early fall. |
Habitat | Stream banks, low woods, low hillsides, roadsides, waste places, sometimes shade trees | In woods and in disturbed sites |
Elevation | 0-500 m (0-1600 ft) | 0-400 m (0-1300 ft) |
Distribution |
AR; FL; LA; MS; OK; TN; TX; n Mexico
|
CA; DC; GA; KY; MA; MD; ME; VA; native to Asia (China and Japan) [Introduced in North America]
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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.) |
Ulmus parvifolia appears to naturalize more easily than U. procera or U. glabra. It has been reported but not documented from Idaho and West Virginia. Ulmus parvifolia is valued in cultivation for its pleasing form and ornamental bark. It is ruderal primarily in the southeastern United States. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Ulmaceae > Ulmus | Ulmaceae > Ulmus |
Sibling taxa | ||
Name authority | Nuttall: Trans. Amer. Philos. Soc., n.s. 5: 169. (1837) | Jacquin: Pl. Hort. Schoenbr. 3: 6, plate 262. (1798) |
Web links |