裂叶榆Ulmus laciniata
中文名（Chinese Name）：裂叶榆
学名（Scientific Name）：Ulmus laciniata (Trautv.) Mayr
英文名（English Common Name）：
别名（Chinese Common Name）：大叶榆、大青榆
异名（Synonym）：Ulmus major var. heterophylla Maxim. et Rupr. Ulmus montana var. laciniata Trautv. Ulmus laciniata f. holophylla Nakai
科属（Family & Genus）：榆科（Ulmaceae）榆属
形态特征（Description）：落叶乔木，高达27米，胸径50厘米；树皮淡灰褐色或灰色，浅纵裂，裂片较短，常翘起，表面常呈薄片状剥落；一年生枝幼时被毛，后变无毛或近无毛，二年生枝淡褐灰色、淡灰褐色或淡红褐色，小枝无木栓翅；冬芽卵圆形或椭圆形，内部芽鳞毛较明显。叶倒卵形、倒三角状、倒三角状椭圆形或倒卵状长圆形，长7-18厘米，宽4-14厘米，先端通常3-7裂，裂片三角形，渐尖或尾状，不裂之叶先端具或长或短的尾状尖头，基部明显地偏斜，楔形、微圆、半心脏形或耳状，较长的一边常覆盖叶柄，与柄近等长，其下端常接触枝条，边缘具较深的重锯齿，叶面密生硬毛，粗糙，叶背被柔毛，沿叶脉较密，脉腋常有簇生毛，侧脉每边10-17条，叶柄极短，长2-5毫米，密被短毛或下面的毛较少。花在去年生枝上排成簇状聚伞花序。翅果椭圆形或长圆状椭圆形，长1.5-2厘米，宽1-1.4厘米，除顶端凹缺柱头面被毛外，余处无毛，果核部分位于翅果的中部或稍向下，宿存花被无毛，钟状，常5浅裂，裂片边缘有毛，果梗常较花被为短，无毛。花果期4-5月。
分布（Distribution）：分布东北、内蒙古、河北、陕西、山西及河南，生于海拔700-2200米地带之山坡、谷地、溪边之林中。俄罗斯、朝鲜、日本也有分布。
用途（Use）：边材黄色或淡褐黄色，心材暗红灰褐色；木材纹理直或斜行，重量及硬度适中。可供家具、车辆、器具、造船及室内装修等用材。
引自中国植物志英文版：FOC Vol. 5 Page 5
Ulmus laciniata (Trautvetter) Mayr, Fremdländ Wald-Parkbäume. 523. 1906.
裂叶榆 lie ye yu| Ulmaceae | Ulmus
Ulmus montana Withering var. laciniata Trautvetter, Mém. Acad. Imp. Sci. St.-Pétersbourg Divers Savans 9: 246. 1859; U. major Hohenacker var. heterophylla Maximowicz.
Trees, to 27 m tall, d.b.h. to 50 cm, deciduous. Bark dark grayish brown to gray, longitudinally fissured, slightly longitudinally exfoliating in flakes. Branchlets pale brownish gray, grayish brown, or reddish brown, pubescent when young, glabrate or glabrescent, unwinged. Winter buds brown, ovoid-orbicular to elliptic; inner bud scales pubescent. Petiole 2-5 mm, glabrous or pubescent; leaf blade obovate, obtriangular-elliptic, or long obovate-orbicular, 7-18 × 4-14 cm, abaxially pubescent, adaxially hirsute but sparsely so late in season, base oblique, margin ciliate and deeply doubly serrate, apex ± truncate, abruptly caudate-acuminate, and often with 1-3 caudate lobes on each side, or sometimes apex rounded; secondary veins 10-17 on each side of midvein. Inflorescences fascicled cymes on second year branchlets. Perianth campanulate, 5-lobed, glabrous or tips of lobes ciliate. Samaras tan or pale green, elliptic to orbicular-elliptic, 1.5-2 × 1-1.4 cm, glabrous except for pubescence on stigmatic surface; stalk shorter than perianth, glabrous; perianth persistent. Seed at center or slightly toward base of samara. Fl. and fr. Apr-May. 2n = 28.
700-2200 m. Hebei, Heilongjiang, Henan, Jilin, Liaoning, Nei Mongol, Shaanxi, Shandong [Japan, Korea, Russia (Far East, E Siberia)].
（责任编辑：徐晔春）
学名（Scientific Name）：Ulmus laciniata (Trautv.) Mayr
英文名（English Common Name）：
别名（Chinese Common Name）：大叶榆、大青榆
异名（Synonym）：Ulmus major var. heterophylla Maxim. et Rupr. Ulmus montana var. laciniata Trautv. Ulmus laciniata f. holophylla Nakai
科属（Family & Genus）：榆科（Ulmaceae）榆属
形态特征（Description）：落叶乔木，高达27米，胸径50厘米；树皮淡灰褐色或灰色，浅纵裂，裂片较短，常翘起，表面常呈薄片状剥落；一年生枝幼时被毛，后变无毛或近无毛，二年生枝淡褐灰色、淡灰褐色或淡红褐色，小枝无木栓翅；冬芽卵圆形或椭圆形，内部芽鳞毛较明显。叶倒卵形、倒三角状、倒三角状椭圆形或倒卵状长圆形，长7-18厘米，宽4-14厘米，先端通常3-7裂，裂片三角形，渐尖或尾状，不裂之叶先端具或长或短的尾状尖头，基部明显地偏斜，楔形、微圆、半心脏形或耳状，较长的一边常覆盖叶柄，与柄近等长，其下端常接触枝条，边缘具较深的重锯齿，叶面密生硬毛，粗糙，叶背被柔毛，沿叶脉较密，脉腋常有簇生毛，侧脉每边10-17条，叶柄极短，长2-5毫米，密被短毛或下面的毛较少。花在去年生枝上排成簇状聚伞花序。翅果椭圆形或长圆状椭圆形，长1.5-2厘米，宽1-1.4厘米，除顶端凹缺柱头面被毛外，余处无毛，果核部分位于翅果的中部或稍向下，宿存花被无毛，钟状，常5浅裂，裂片边缘有毛，果梗常较花被为短，无毛。花果期4-5月。
分布（Distribution）：分布东北、内蒙古、河北、陕西、山西及河南，生于海拔700-2200米地带之山坡、谷地、溪边之林中。俄罗斯、朝鲜、日本也有分布。
用途（Use）：边材黄色或淡褐黄色，心材暗红灰褐色；木材纹理直或斜行，重量及硬度适中。可供家具、车辆、器具、造船及室内装修等用材。
引自中国植物志英文版：FOC Vol. 5 Page 5
Ulmus laciniata (Trautvetter) Mayr, Fremdländ Wald-Parkbäume. 523. 1906.
裂叶榆 lie ye yu| Ulmaceae | Ulmus
Ulmus montana Withering var. laciniata Trautvetter, Mém. Acad. Imp. Sci. St.-Pétersbourg Divers Savans 9: 246. 1859; U. major Hohenacker var. heterophylla Maximowicz.
Trees, to 27 m tall, d.b.h. to 50 cm, deciduous. Bark dark grayish brown to gray, longitudinally fissured, slightly longitudinally exfoliating in flakes. Branchlets pale brownish gray, grayish brown, or reddish brown, pubescent when young, glabrate or glabrescent, unwinged. Winter buds brown, ovoid-orbicular to elliptic; inner bud scales pubescent. Petiole 2-5 mm, glabrous or pubescent; leaf blade obovate, obtriangular-elliptic, or long obovate-orbicular, 7-18 × 4-14 cm, abaxially pubescent, adaxially hirsute but sparsely so late in season, base oblique, margin ciliate and deeply doubly serrate, apex ± truncate, abruptly caudate-acuminate, and often with 1-3 caudate lobes on each side, or sometimes apex rounded; secondary veins 10-17 on each side of midvein. Inflorescences fascicled cymes on second year branchlets. Perianth campanulate, 5-lobed, glabrous or tips of lobes ciliate. Samaras tan or pale green, elliptic to orbicular-elliptic, 1.5-2 × 1-1.4 cm, glabrous except for pubescence on stigmatic surface; stalk shorter than perianth, glabrous; perianth persistent. Seed at center or slightly toward base of samara. Fl. and fr. Apr-May. 2n = 28.
700-2200 m. Hebei, Heilongjiang, Henan, Jilin, Liaoning, Nei Mongol, Shaanxi, Shandong [Japan, Korea, Russia (Far East, E Siberia)].
（责任编辑：徐晔春）
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