《中国植物志》|| 荨麻科 URTICACEAE ||珠芽艾麻组 Sect. Laportea ||墨脱艾麻 Laportea medogensis C. J. Chen

3.墨脱艾麻（植物分类学报）图版6，1-6
Laportea medogensis C. J. Chen in Acta Phytotax. Sin. 28 (1): 68, fig. 1. 1990.
多年生草本。茎高30-60厘米，密生刺毛，在上部还混生有微柔毛。叶草质或近膜 质，宽卵形，长14-17厘米，宽9-12厘米，先端短渐尖，渐尖头全缘，基部浅心形， 稀近截形，边缘具牙齿，齿尖常有一根刺毛，上面生长刺毛，下面被微硬毛及脉上混生 有短刺毛，钟乳体细点状，尤其在上面较明显，基出脉3，其侧生一对达中上部，侧脉5-6对，弧曲，在近叶缘处网结，小脉结成细网；叶柄长4-8厘米，密生刺毛和短柔毛；托 叶披针形，长10-14毫米，先端2浅裂，背面贴生微柔毛，不久脱落。花雌雄同株，花 序圆锥状，雄花序生下部叶腋，长2-3厘米，或更长，具短梗，序轴生微柔毛；雌花序 生顶部叶腋，具长梗，分枝成二列，花序梗（未成熟）长4厘米，密生刺毛。雄花无梗 或具短梗，在芽时扁球形，直径1-1.2毫米：花被片5，外面近顶端被微柔毛；雄蕊5； 退化雌蕊具短柄，扁球形，直径约o-8毫米；小苞片卵形，长约0.4毫米。雌花具短梗： 花被片4,分生，内面的2枚等大，椭圆状卵形，长约0.8毫米，先端锐尖，外面的2枚 极不等大，其中背生一枚最大，兜状，长约0.9毫米，宽约1.2毫米，先端钝圆，腹生 的一枚最小，狭卵形，长约0.4毫米；子房具短柄，直立，柱头线形，长2-3毫米，周 围具短柱头毛。瘦果未见。花期1月。
仅见于西藏墨脱（模式产地）。生于海拔850-1 600米山坡半常绿及常绿阔叶林下阴 湿处。

《Flora of China》|| Urticaceae || Laportea ||墨脱艾麻 Laportea medogensis

2. Laportea medogensis C. J. Chen, Acta Phytotax. Sin. 28: 68. 1990.

墨脱艾麻 mo tuo ai ma

Herbs, often with fusiform tuberous roots, monoecious. Stems 30-60 cm tall, straight, simple, without axillary bulbils; stem and petioles puberulent and very densely armed with stinging hairs. Leaves regularly alternate; stipules early caducous, lanceolate, 10-14 mm, puberulent along rib abaxially, apex 2-cleft; petiole 4-8 cm; leaf blade greenish, broadly ovate, 14-17 × 9-12 cm, herbaceous or submembranous, 3-veined, lateral basal pair reaching middle, lateral veins 5 or 6 each side of midvein, anastomosing before margin, abaxial surface with short, stinging and setulose hairs on veins, adaxial surface with stinging hairs, base shallowly cordate, rarely subtruncate, margin coarsely dentate, each tooth with 1 apical stinging hair, apex short acuminate, acumen entire; cystoliths minutely punctiform, adaxially conspicuous. Male inflorescences in proximal axils, paniculate, 2-4 cm; female inflorescences in distal axils, at least 4 cm (when young), densely armed with stinging hairs. Male flowers shortly pedicellate or subsessile, in bud 1-1.2 mm; perianth lobes 5, puberulent at apex, apex not corniculate; stamens 5; rudimentary ovary obpyramidal, ca. 0.6 mm. Female flowers pedicellate; perianth lobes 4, almost free, strongly unequal, dorsal lobe the largest, concave, ca. 0.9 × 1.2 mm, apex obtuse, 2 lateral (inner) lobes elliptic-ovate, ca. 0.8 mm, apex acute, ventral lobe smallest, narrowly ovate, ca. 0.4 mm. Ovary stipitate, triangular-ovoid; stigma filiform, ca. 2-3 mm. Achene unknown. Fl. Jan.

* Moist places of evergreen forests, along streams; 800-1600 m. SE Xizang (Mêdog).

This is a remarkable but little-collected species; more collections are needed to understand its relationships.