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Ulmus pumila L.
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Ulmus pumila
© Copyright Bobby Hattaway 2011 · 2
Ulmus pumila

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Ulmus pumila, seed
© Copyright Seeds USID 2015 · 1
Ulmus pumila, seed

Associates · map
FamilyScientific name @ source (records)
Aphididae  Pterocomma smithiae @ NCSU (2)

Tinocallis ulmifolii @ CSCA_TCN (1)
Botryosphaeriaceae  Diplodia clavispora @ BPI (1)
Cicadellidae  Kyboasca bipunctata @ III (3)
Coccinellidae  Coccinella septempunctata @ I_LB (1)
Dermateaceae  Gloeosporium ulmicolum @ BPI (6)
Diaporthaceae  Phomopsis @ BPI (1)
Diaspididae  Chionaspis americana @ CSCA_TCN (1)

Hemiberlesia popularum @ CSCA_TCN (1)
Eriococcidae  Eriococcus spurius @ CSCA_TCN (2)
Erysiphaceae  Erysiphe clandestina @ BPI (1)

Uncinula kenjiana @ BPI (1)
Glomerellaceae  Colletotrichum @ BPI (1)
Gnomoniaceae  Gnomonia ulmea @ BPI (10)
Miridae  Blepharidopterus ulmicola @ AMNH_PBI (53)

Cyllecoris equestris @ AMNH_PBI (5)

Pherolepis aenescens @ AMNH_PBI (15)

Pilophorus mongolicus @ AMNH_PBI (7)

Pilophorus niger @ AMNH_PBI (2)
Nectriaceae  Fusarium @ BPI (1)

Nectria cinnabarina @ BPI (8)

Tubercularia nigricans @ BPI (3)

Tubercularia ulmea @ BPI (2)

Tubercularia vulgaris @ BPI (2)
Patellariaceae  Tryblidiella rufula @ BPI (1)
Rhytismataceae  Melasmia ulmicola @ BPI (1)
Schizophyllaceae  Schizophyllum commune @ BPI (1)
Valsaceae  Cytospora ambiens @ BPI (1)
_  Acremoniella atra @ BPI (1)

Discocolla @ BPI (1)

Myxosporium hymenuloides @ BPI (1)

Thyrostroma compactum @ BPI (2)

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5. Ulmus pumila Linnaeus, Sp. Pl. 1: 226. 1753.

Siberian elm

Ulmus campestris Linnaeus var. pumila Maximowicz; U . manshurica Nakai; U . turkestanica Requien

Trees , 15 to 30 m; crowns open. Bark gray to brown, deeply furrowed with interlacing ridges. Wood brittle. Branches not winged; twigs gray-brown, pubescent. Buds dark brown, ovoid, glabrous; scales light brown, shiny, glabrous to slightly pubescent. Leaves: petiole 2-4 mm, glabrous. Leaf blade narrowly elliptic to lanceolate, 2-6.5 × 2-3.5 cm, base generally not oblique, margins singly serrate, apex acute; surfaces abaxially with some pubescence in axils of veins, adaxially glabrous; lateral veins forking to 3 times per side. Inflorescences tightly clustered fascicles, 6-15-flowered, 0.5 cm, flowers and fruits not pendulous, sessile. Flowers: calyx shallowly lobed, lobes 4-5, glabrous; stamens 4-8; anthers brownish red; stigmas green, lobes exserted. Samaras yellow-cream, orbiculate, 10-14 mm diam., broadly winged, glabrous, tip notched 1/3-1/2 its length. Seeds thickened, not inflated. 2 n = 28.

Flowering late winter-early spring. Commonly escaping from cultivation, waste places, roadsides, fencerows; 0-2200 m; N.B., Ont., Que.; Ala., Ariz., Ark., Calif., Colo., Conn., D.C., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Md., Mass., Mich., Minn., Mo., Mont., Nebr., Nev., N.J., N.Mex., N.Y., N.Dak., Ohio, Okla., Pa., S.Dak., Tenn., Tex., Utah, Va., Wis., Wyo.; Asia.

Ulmus pumila probably occurs in Vermont and West Virginia, but it has not been documented for those states.

Planted for quick-growing windbreaks, Ulmus pumila has weak wood, and its branches break easily in mature trees. It is easily distinguished from other North American elms by its singly serrate leaf margins. Ulmus pumila is similar to U . parvifolia Jacquin with its small, singly serrate leaves. Ulmus parvifolia , however, has smooth bark that sheds from tan to orange, and it flowers and sets fruit in the fall.

Updated: 2024-07-25 01:15:56 gmt
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