四川酸蔹藤 si chuan suan lian teng

Lianas, semiwoody. Branchlets terete, with longitudinal ridges, with sparse arachnoid tomentum when young, then falling off; tendrils bifurcate. Leaves 3-foliolate; petiole 1.5-6 cm; central petiolule 0.5-2.5 cm, lateral petiolules 0.3-1.5 cm, glabrous or sparsely pubescent adaxially; leaflets abaxially sparsely pubescent on veins, adaxially with sparse, white, arachnoid tomentum when young, then glabrescent, lateral veins 3-5 pairs, veinlets inconspicuously raised; central leaflet oval or ovate-oblong, usually pinnately 2- or 3-divided, 3-8 × 2-6.5 cm, base cuneate, unlobed leaves with 5-10 obtuse teeth on each side of margin, apex acute; lateral leaflets oval, 2-6.5 × 1.5-5.5 cm, usually pinnately 2- or 3-divided, base highly asymmetric, margin of unlobed leaflets with 5-7 obtuse teeth, apex acute. Compound dichasium leaf-opposed, base cirrose; peduncle 4-4.5 cm, nearly glabrous. Berry obovoid-ellipsoid, 7-10 × 6-8 mm in diam., 2- or 3-seeded. Seeds oblong, base rostrate, apex subrounded, chalazal knot narrow to elliptic. Fr. Aug.

● Hillsides; 1200-1300 m. Sichuan.