Trees to 30 m tall. Leaves even-pinnate, rarely odd-pinnate, 8-16(-25) cm; petiole 2-6.5 cm, sparsely pubescent; rachis often winged or sometimes only ridged or sulcate on some leaves, sparsely pubescent to tomentose; leaflets (6-)11-21(-25), sessile, long elliptic to elliptic-lanceolate, 8-12 × 2-3 cm, abaxially slightly pubescent, base oblique, cuneate or broadly cuneate, apex obtuse or acute. Fruiting spike 20-45 cm, axis pubescent at first but becoming nearly glabrous. Nutlets long ellipsoid, 6-7 mm, slightly pubescent to glabrescent; wings linear, 1.2-2.5 × 3-6 mm. Fl. Apr-May, fr. Aug-Sep. 2n = 32.
Pterocarya stenoptera seeds
- Forests on mountain slopes or riverbanks; near sea level to 1500 m. Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Hebei, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Liaoning, Shaanxi, Shandong, Shanxi, Sichuan, Taiwan, Yunnan, Zhejiang [Japan, Korea]
Widely cultivated as a shade tree.