Catalpa ovata seeds mature in October.Catalpa ovata G. Don, Gen. Hist. 4: 230. 1837.
梓 zi
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.

Catalpa ovata seeds

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  • Catalpa ovata, the yellow catalpa or Chinese catalpa(Chinese: 梓; pinyin: zǐ), is a pod-bearing tree native to China. Compared to C. speciosa, it is much smaller, typically reaching heights between 20 and 30 feet. The inflorescences form 4–10-inch-long (100–250 mm) bunches of creamy white flowers with distinctly yellow tinging; individual flowers are about 1 inch wide. They bloom in July and August.The leaves are very similar in shape to those of Paulownia tomentosa, having three lobes (two are abruptly truncated on either edge, with a third, central, slightly acute, pointed lobe forming the leaf apex), and are darkly green.Fruits are very narrow, foot-long pods.Although native to the more temperate provinces within China (Anhui, Gansu, Hebei, Heilongjiang, Henan, Hubei, Jiangsu, Jilin, Liaoning, Nei Monggol, Ningxia, Qinghai, Shaanxi, Shandong, Shanxi, Sichuan, Xinjiang),C. ovata is also cultivated in North America and Europe.It is commonly used to make the undersides of qin.Although native to the more temperate provinces within China (Anhui, Gansu, Hebei, Heilongjiang, Henan, Hubei, Jiangsu, Jilin, Liaoning, Nei Monggol, Ningxia, Qinghai, Shaanxi, Shandong, Shanxi, Sichuan, Xinjiang), C. ovata is also cultivated in North America and Europe.It is commonly used to make the undersides of qin.