《中国植物志》|| 荨麻科 URTICACEAE ||雾水葛属 Pouzolzia Gaudich. ||美叶雾水葛 Pouzolzia calophylla W. T. Wang & C. J. Chen

3.美叶雾水葛（植物分类学报）图版81：8-9
Pouzolzia calophylla W. T. Wang et C. J. Chen in Acta Phytotax. Sin. 17 (1): 108. 1979; 西藏植物志1: 558, 图179 (4-5). 1983.
灌木，高约2米，常多分枝；小枝细，直径1-2毫米，有稍密的极短伏毛，有时混 有较少开展的毛。叶互生；叶片纸质，狭卵形、披针形、菱状披针形或狭菱形，长2.2-12厘米，宽0.7-3.6厘米，顶端长渐尖或渐尖，基部楔形或钝，边缘下部全缘，以上有 4-12个小牙齿，上面无毛或沿中脉有少数短伏毛，下面密被有光泽的银灰色或淡黄绿色 毡毛，沿脉网有短伏毛，侧脉1-2对；叶柄长4-8毫米。团伞花序单性，雄的直径约 8毫米，雌的直径2-3毫米；苞片三角形，长约1.5毫米。雄花：花被片4，椭圆形，长 约1.8毫米，合生至近中部处，顶端锐尖或具不明显小尖头，外面有短柔毛；雄蕊长2.5-2.8毫米，花药长约0.8毫米；退化雌蕊狭倒披针形，长约1毫米，基部周围有白色柔毛。 雌花：花被纺锤形，长1-1.2毫米，顶端有2不明显小齿，外面密被短毛，果期呈菱状 狭倒卵形，长约1.8毫米；柱头长0.8-1.5毫米。瘦果近椭圆球形，长约1毫米，淡灰 褐色，有光泽。花期7月。
产西藏察隅（模式产地）。生于海拔1 900米一带山坡灌丛中。

《Flora of China》|| Urticaceae || Pouzolzia ||美叶雾水葛 Pouzolzia calophylla

2. Pouzolzia calophylla W. T. Wang & C. J. Chen, Acta Phytotax. Sin. 17(1): 108. 1979.

美叶雾水葛 mei ye wu shui ge

Pouzolzia argenteonitida W. T. Wang; P. ovalis var. fulgens Weddell; P. sanguinea (Blume) Merrill var. fulgens (Weddell) Hara.

Shrubs 1.5-4 m tall; branchlets densely appressed or, sometimes, patently strigose, seldom lateral superior shoots leafless, but with some glomerules at nodes. Leaves alternate; stipules lanceolate, 5-7 mm; petiole 0.4-1.6 cm; leaf blade lanceolate, rarely narrowly ovate, 2.5-13 × 0.7-4(-5) cm, papery, secondary veins 2 or 3 each side of midvein toward apex, abaxial surface silvery tomentose, densely appressed sericeous with strigose hairs on veins, adaxial surface glabrous or subglabrous, base cuneate or obtuse, margin (4-)8-18(-37)-dentate, apex acuminate to cuspidate. Glomerules unisexual or bisexual, 3-8 mm in diam.; bracts narrowly ovate or triangular, 0.6-2 mm; female glomerules without spinescent bracts. Male flowers: perianth lobes 4, connate 1/2 of length, strigose, apex acute to cuspidate. Female perianth tube fusiform or obovoid, 1-1.2 mm, ca. 2 mm in fruit, pubescent, inconspicuously ribbed, 3-toothed. Achenes gray-brown, ovoid or subellipsoid, slightly compressed, 1-1.2 mm. Fl. Jul-Aug, fr. Aug-Oct.

Evergreen, broad-leaved forests, thickets, valleys; 1600-2800 m. SE Xizang, NW Yunnan [Bhutan, NE India, Myanmar, Nepal].

This species and Pouzolzia sanguinea differ clearly in leaf indumentum (as indicated in the key) and merit the rank of distinct species. Pouzolzia calophylla is variable in trichomes on branchlets, number of teeth on leaf margins, and veins on the abaxial leaf surface. It seems, therefore, impossible to maintain P. argenteonitida, which is treated here as a synonym.