1. Cnesmone tonkinensis (Gagnepain) Croizat, J. Arnold Arbor. 22: 429. 1941.
灰岩粗毛藤 hui yan cu mao teng
Cenesmon tonkinense Gagnepain, Bull. Soc. Bot. France 71: 869. 1925; Cnesmone anisosepala (Merrill & Chun) Croizat; Tragia anisosepala Merrill & Chun.
Subshrubs, stem twining or climbing, 5-7 m tall, most parts densely yellow villous and with stinging hairs. Stipules broadly triangular, 4-7[-10] mm, pilose; petiole 2-7.5[-9] cm, villous; leaf blade elliptic, oblong-ovate, or narrowly ovate, 8-15 × 4-9 cm, papery or membranous, adaxially villous, abaxially tomentose, base cordate, margin coarsely irregularly serrate, apex acute or acuminate; basal veins ?3, lateral veins 3-5 pairs. Racemes 2-12 cm, villous; peduncle 1-6 cm; female flowers (1 or)2(or 3), male flowers many; bracts lanceolate, 1-4 mm. Male flowers: pedicel ca. 1.5 mm; calyx globose in bud, ca. 3 mm in diam., pilose; calyx lobes 3, broadly ovate, ca. 2 mm; stamens 0.6-1 mm, locule ca. 0.5 mm. Female flowers: pedicel ca. 1 mm; sepals 6, unequal, villous, larger 3 elliptic or obovate, 5-7 × 2-3 mm, smaller 3 lanceolate or oblanceolate, 2-5 × 0.5-1 mm, sepals slightly larger in fruit; ovary densely hispid and villous; styles thick, wide-spreading, 2-3 mm, plumose and ?papillose. Capsule ca. 10 mm in diam., villous. Seeds globose, 4-4.5 mm in diam., brownish marbled. Fl. Apr-Sep, fr. May-Oct.
Mountain valleys, limestone rocks, slopes, thickets, forests; 100-600 m. SW Guangxi, Hainan [Thailand, N Vietnam].