Vines climbing. Stem branched, woody; stem and branches densely prickly-bristly; bristles 5--6 mm. Petiole 1.5--2.5 cm, densely bristly, wingless; tendrils usually present. Leaf blade ovate, 10--14.5 × 6--11 cm, papery, abaxially ± bristly from base to middle, adaxially sometimes also sparsely bristly, main veins 3, base usually shallowly cordate, apex acuminate. Male inflorescence of 1 umbel, basally prophyllate; peduncle 2.5--3.5 cm, minutely bristly, proximally articulate; umbel many flowered. Male flowers (not fully at anthesis): tepals greenish, ca. 4 mm; anthers ca. 1.5 mm. Female flowers and fruit unknown. Fl. Nov--Dec.

* Forests, thickets; 1000--1700 m. SE Yunnan.