1. Securidaca yaoshanensis K. S. Hao, Repert. Spec. Nov. Regni Veg. 40: 213. 1936.
瑶山蝉翼藤 yao shan chan yi teng
Shrubs 2-3 m tall. Stem ± terete, slightly furrowed. Branchlets yellow-brown to deep castaneous, or yellowish, very shortly thinly strigose. Petiole 4-7 mm, slightly and thinly strigose, with 2 "mushroom-shaped" glands at base; leaf blade greenish, ovate-oblong, 5-10.5 × 3.5-4 cm, thickly papery or leathery, abaxially glabrous or very shortly and thinly strigose, adaxially glabrous, midvein raised abaxially, sunken adaxially, lateral veins 5-7 pairs, base rounded, margin entire, slightly recurved, apex acuminate. Panicles terminal or axillary, 5-11 cm, yellow strigose; pedicels 1-1.4 cm, glabrous; bracteoles 3, caducous, triangular-subulate, unequal, sparsely yellow strigose. Sepals 5, outer 3 ovate, subequal, small, ca. 3 × 2 mm, apex obtuse; inner 2 petaloid, suborbicular, large, ca. 5 mm in diam., base cuneate, apex retuse, ciliate. Petals 3, connate below middle, purplish red, ca. 6 mm, keel with small appendage; lateral petals shorter, ca. 4 mm. Ovary compressed, ovoid-oblong, ca. 1.5 mm, 1-loculed; ovule 1; style ca. 3.5 mm, smooth; stigma capitate, slightly lobed. Samara green-purple, with wing and wing-shaped appendage; wing oblong or subrhombic, 5-6 × 1.6-2 cm, leathery, with much-curved veins; body of fruit subglobose, 1.2-1.6 cm in diam., fruit coat thick, hard, indehiscent, with conspicuous reticulate veins. Seed 1, subglobose, 8-16 mm in diam. Fl. Jul, fr. Oct.
● Forests; 1000-1500 m. Guangdong, Guangxi, Yunnan.