大叶鱼藤 da ye yu teng

Basionym: Derris latifolia Prain, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 67: 288. 1898.

Trees. Leaves 5- or 7-foliolate; rachis 45-60 cm, including petiole 9-15 cm; leaflet blades ovate-oblong to ovate-lanceo­late, 14-25 × 7-10 cm, thickly papery, both surfaces glabrous, midvein abaxially conspicuously raised and adaxially im­pressed, base broadly cuneate to subrounded, apex acuminate. Pseudopanicles axillary, copious, 50-65 cm, glabrous; branches 5-10 cm; branchlet nodes close together, with 1 flower. Pedicel ca. 2 mm. Flower ca. 6.5 mm. Calyx broadly campanulate, ca. 2.5 × 3 mm, glabrous, apex subtruncate. Corolla standard erect, orbicular, ca. 7.5 mm in diam., without basal calluses. Legume woody, 9-11 × ca. 3.5 cm, thin, smooth, glabrous, without retic­ulate veins; both sutures with a 3-5 mm wide wing. Seed 1 per legume. Fl. unknown, fr. Jan.

Open forests on mountain slopes; 600-1200 m. Guangxi, Yunnan [N Myanmar].