红豆树 hong dou shu

Ormosia taiana C. Y. Chiao.

Trees evergreen or deciduous, 20-30 m, to 1 m d.b.h. Bark of stems grayish green, smooth. Branchlets green, yellowish brown pubescent, becoming glabrescent; winter buds brownish yellow pubescent. Leaves imparipinnate, 12.5-23 cm; petiole 2-4 cm; rachis 3.5-7.7 cm, prolonged 0.2-2 cm below terminal leaflet, petiolule and rachis sparsely appressed pubescent or gla­brous; leaflets (3-)5(-9); petiolule 2-6 mm, rounded, without groove; blades pale green abaxially, dark green adaxially, ovate or ovate-elliptic, rarely suborbicular, 3-10.5 × 1.5-5 cm, thinly leathery, young leaves sparsely appressed pubescent, becoming glabrate or with scattered hairs only on midvein abaxially, base rounded or broadly cuneate, apex acute or acuminate; lateral veins 8-10 pairs, angled 60° with midvein, both lateral veins and veinlets conspicuously reticulate when dried. Panicles ter­minal or axillary, 15-20 cm, pendulous. Flowers few, fragrant; pedicel 1.5-2 cm. Calyx broadly campanulate; teeth purplish green, triangular, densely appressed brownish pubescent. Corol­la white or purplish; standard obovate, 1.8-2 cm; both wings and keel oblong. Stamens unequal; anthers yellow. Ovary gla­brous; ovules 5 or 6; style purple, filiform, curved; stigma oblique. Legumes suborbicular, compressed, 3.3-4.8 × 2.3-3.5 cm, apex shortly beaked, stipe 5-8 mm; valves subleathery, 2-3 mm thick, brownish when dried, glabrous, veins obvious, inter­nal septum absent. Seeds 1 or 2, red, suborbicular or elliptic, 15-18 × 12-15 × ca. 5 mm; hilum 9-10 mm. Fl. Apr-May, fr. Oct-Nov.

● Riversides, mountain slopes, valley forests; 200-900(-1400) m. Anhui, Fujian, Gansu, Guizhou, Hubei, SE Jiangsu, Jiangxi, S Shaanxi, Sichuan, Zhejiang.