《中国植物志》|| 荨麻科 URTICACEAE ||刺果冷水花系 Ser. Spinulosae C. J. Chen ||海南冷水花 Pilea tsiangiana Metc.

10.海南冷水花（海南植物志）
Pilea tsiangiana Metc. in Lingnan Sci. Journ. 15: 633, pl. 26. 1936; 海南植物志2: 404. 1965; C. J. Chen in Bull. Bot. Res. (Harbin) 2 (3): 50. 1982.
半灌木，无毛。茎高30-100厘米，干时淡绿色，密布短杆状钟乳体。叶在同对近 等大，薄纸质，椭圆形或卵形，长5-14厘米，宽3.5-7.5厘米，基部宽楔形、圆形或 微缺，先端急尖或渐尖，边缘自下部以上有浅锯齿，两面干后淡绿色，有时变绿褐色，钟 乳体纺锤形，长0.4-0.5毫米，两面密布，基出脉3，在下面显著隆起，在上面凹陷，其 侧生的一对弧曲，达近先端齿尖，侧脉8-10对，横向开展，外向二级脉10余条，横出， 在近边缘处彼此网结；叶柄在同对的近等长，长1-3.5厘米，密布钟乳体；托叶，草质， 长圆形，长6-8毫米，早落。雌雄异株或同株，有时雌雄花混生，花序成对生于叶腋， 雄的聚伞总状，长2-4.5厘米，团伞花簇稀疏排列于花枝上；雌的呈二歧聚伞状分枝， 长约1.5厘米。雄花具梗，长约1.5毫米；花被片4，卵形，外面近先端处有短角，红褐 色，有时带绿色，密生钟乳体；雄蕊4，花药肾形，有紫红色横向条纹，药隔深紫红色， 基部围以稀疏绵毛；退化雌蕊近圆柱形，长约0.3毫米。雌花近无梗，长近1毫米。瘦 果圆卵形，压扁，几不偏斜，长约2毫米，表面密生紫褐色斑点，宿存花被片4，三角状 卵形，长约及果的1/4,外面被钟乳体。花期8-10月，果期11月至次年1月。
产海南和广西。生于山谷密林下阴湿处或溪边。越南北部也有。模式标本采自海南 儋县。

《Flora of China》|| Urticaceae || Pilea ||海南冷水花 Pilea tsiangiana

10. Pilea tsiangiana Metcalfe, Lingnan Sci. J. 15: 633. 1936.

海南冷水花 hai nan leng shui hua

Subshrubs glabrous, monoecious or dioecious. Stems light green when dry, 30-100 cm; stems, stipules, petioles, and both surfaces of leaf blade densely covered with cystoliths. Stipules deciduous, green, oblong, 6-8 mm, papery, longitudinally 2-ribbed; petiole subequal in length, 1-3.5 cm; leaf blade abaxially pale green, adaxially green, elliptic or oblong, subequal in size, 7-14 × 3.5-7.5 cm, thinly papery, 3-veined, lateral veins 8-10 each side, transverse, prominent abaxially, external secondary veins anastomosing by margin, base broadly cuneate, rounded, or subcordate, margin crenate-serrate from base, apex acute or acuminate. Inflorescences unisexual or sometimes of mixed sexes, in pairs; male inflorescence a racemelike cyme, few branched, 2-4.5 cm, glomerules scattered; female inflorescence a dichotomous cyme, ca. 1.5 cm. Male flowers reddish brown, pedicellate, in bud ca. 1.5 mm; perianth lobes 4, ovate, connate 1/2 of length, subapically corniculate; stamens 4; rudimentary ovary cylindric, ca. 0.3 mm. Female flowers subsessile; perianth lobes triangular-ovate, persistent perianth 1/4 as long as achene; staminodes oblong. Achene densely purplish spotted, ovoid, ca. 2 mm, compressed, smooth. Fl. Aug-Oct, fr. Nov-Jan.

Shaded wet places in forests, near streams; 200-300 m. Guangxi, Hainan [N Vietnam].