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梓树Catalpa ovata

时间:2013-07-17 13:04来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ):梓树 学名( Scientific Name ): Catalpa ovata G. Don 英文名( English Common Name ): Chinese catalpa 别名( Chinese Common Name ): 臭梧桐 异名( Synonym ): Catalpa henryi Dode;Catalpa kaempferi Siebold et





中文名(Chinese Name):梓树
学名(Scientific Name):Catalpa ovata G. Don
英文名(English Common Name):Chinese catalpa
别名(Chinese Common Name):臭梧桐
异名(Synonym):Catalpa henryi Dode;Catalpa kaempferi Siebold et Zucc.;Bignonia catalpa Thunb.;Catalpa bignonioides var. kaempferi DC.;Catalpa himalayaca Dippel;Catalpa himalayensis Dippel;Catalpa nana Dippel;Catalpa ovata var. flavescens Bean;Catalpa wallichiana auct.
科属(Family & Genus):紫葳科(Bignoniaceae)梓属
形态特征(Description):乔木,高达15米;树冠伞形,主干通直,嫩枝具稀疏柔毛。叶对生或近于对生,有时轮生,阔卵形,长宽近相等,长约25厘米,顶端渐尖,基部心形,全缘或浅波状,常3浅裂,叶片上面及下面均粗糙,微被柔毛或近于无毛,侧脉4-6对,基部掌状脉5-7条;叶柄长6-18厘米。顶生圆锥花序;花序梗微被疏毛,长12-28厘米。花萼蕾时圆球形,2唇开裂,长6-8毫米。花冠钟状,淡黄色,内面具2黄色条纹及紫色斑点,长约2.5厘米,直径约2厘米。能育雄蕊2,花丝插生于花冠筒上,花药叉开;退化雄蕊3。子房上位,棒状。花柱丝形,柱头2裂。蒴果线形,下垂,长20-30厘米,粗5-7毫米。种子长椭圆形,长6-8毫米,宽约3毫米,两端具有平展的长毛。
分布(Distribution):产长江流域及以北地区,日本也有,野生极少。
用途(Use):
引自中国植物志英文版FOC Vol. 18 Page 215
Catalpa ovata G. Don, Gen. Hist. 4: 230. 1837.
梓 zi | Bignoniaceae  | Catalpa
Bignonia catalpa Thunberg; Catalpa henryi Dode; C. kaempferi Siebold & Zuccarini.
Trees ca. 15 m tall; young branches sparsely pubescent. Leaves opposite or nearly so, sometimes whorled; petiole 6-18 cm; leaf blade broadly ovate, ca. 25 X 25 cm, scabrous, sparsely pubescent, or glabrescent, base cordate, margin entire or sinuolate, usually 3-lobed, apex acuminate; lateral veins 4-6 on each side of midrib, palmately 5-7-veined basally. Inflorescences paniculate, terminal; peduncle sparsely pubescent, 12-28 cm. Calyx bilabiate, 6-8 mm. Corolla campanulate, pale yellow, yellow 2-striate and purple spotted at throat, ca. 2.5 X 2 cm. Anthers divergent. Style filiform; stigma 2-lobed. Capsule linear, nodding, 20-30 cm X 5-7 mm. Seeds long ellipsoid, 6-8 X ca. 3 mm, villous at both ends. Fl. May-Jun, fr. Aug-Oct. 2n = 40*.
* Slopes; (500-)1900-2500 m. Anhui, Gansu, Hebei, Heilongjiang, Henan, Hubei, Jiangsu, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shandong, Shanxi, Sichuan, Xinjinag [introduced elsewhere].
The fruit are used medicinally for promoting diuresis.

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