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.

（责任编辑：徐晔春）