Pilea semisessilis Hand.-Mazz.

Herbs perennial, stoloniferous, glabrous, monoecious or dioecious. Stems blue green when dry, 20-60 cm tall, woody at base, succulent distally, swollen between nodes. Stipules persistent; triangular to oblong, 2-5 mm, membranous, petiole strongly unequal in length, 0-4 cm; leaf blade abaxially pale green, adaxially often blue-green, falcate-lanceolate rarely ovate-lanceolate, usually asymmetric, unequal in size, (2.5-)5-14 × (1-)1.5-5 cm, membranous, 3-veined, lateral veins many, transverse, abaxial surface sometimes puberulent along veins, adaxial surface sparsely pilose, cystoliths fusiform often conspicuous, base emarginate or subcordate, margin sharply serrate or shallowly serrate, acumen serrulate, apex long caudate-acuminate. Inflorescences solitary, male a paniculate cyme, 2-7 cm; pedunculate, female inflorescence 1.5-4 cm, peduncle 1-3 cm. Male flowers subsessile, in bud ca. 1 mm; perianth lobes 4, oblong-elliptic, apex acute; stamens 4; rudimentary ovary minute. Female flowers subsessile, in bud ca. 0.8 mm; perianth lobes connate at base, subequal, abaxial lobe larger, subapically corniculate; staminodes 3, scale-like, oblong. Achene brownish, broadly ovoid, ca. 1 mm, compressed, not oblique, smooth, enclosed by unequal perianth lobes. Fl. Jul-Sep, fr. Sep-Oct.

N Guangxi, Hunan, W Jiangxi, Sichuan, SE Xizang, NW Yunnan [N Thailand].

Shaded wet places of Pinus forests, roadsides; 1000-2800(-3400) m.

Pilea semisessilis là loài thực vật có hoa trong họ Tầm ma. Loài này được Hand.-Mazz. miêu tả khoa học đầu tiên năm 1929.

镰叶冷水花（学名：Pilea semisessilis）为荨麻科冷水花属的植物，是中国的特有植物。分布在中国大陆的湖南、江西、广西、西藏、四川、云南等地，生长于海拔1,000米至3,400米的地区，多生在山谷林下以及山坡路边草丛中，目前尚未由人工引种栽培。