18. Piper submultinerve C. de Candolle, Notizbl. Bot. Gart. Berlin-Dahlem. 6: 480. 1917.
多脉胡椒 duo mai hu jiao
Climbers 3-12 m long, dioecious. Stems thickly ridged, densely hispidulous. Petiole 1.5-3.5 cm, densely hispid-pubescent, nearly tomentose; leaf blade ovate to ovate-lanceolate or oblong, 9-20 × 2.5-11 cm, papery, densely glandular, abaxially hispidulous, adaxially pubescent along veins, especially near base, base deeply cordate, basal lobes sometimes partly overlapping and unequal, bilateral difference to 1.5 mm, apex acute to slightly acuminate; veins 7 or 9, apical pair arising up to 1 cm above base, others ± basal; reticulate veins conspicuous, abaxially slightly prominent. Spikes leaf-opposed. Male spike not seen. Female spikes 3-4 cm when young, to 6-8 × ca. 0.9 cm in fruit; peduncle longer than opposing petioles, hispidulous; rachis roughly pubescent; bracts orbicular, ± sessile, peltate, ca. 1 mm in diam., glabrous abaxially. Stigmas 4 or 5, recurved, linear, apex acute. Drupe globose, ca. 3 mm in diam., partly connate to rachis. Fl. Apr-Jun.
* Forests, on trees and rocks in shady and wet places; 1400-2500 m. NW and W Guangxi, S and SE Yunnan.