29. Pilea oxyodon Weddell, Monogr. Urtic. 221. 1856.
雅致冷水花 ya zhi leng shui hua
Pilea bracteosa var. oxyodon (Weddell) H. Hara.
Herbs perennial, stoloniferous, monoecious or dioecious. Stems branched, 10-25 cm tall, succulent distally, with galls on mid portion of internodes, puberulent adaxially, Stipules persistent, light green, oblong-ovate, 4-5 mm, membranous, veinless; petioles unequal in length, 0.5-2 cm, sparsely puberulent; leaf blade abaxially pale green, broadly ovate, unequal in size, 1-3 × 0.6-2.5 cm, herbaceous, 3-veined, lateral veins many, both surfaces sparsely puberulent along veins, base rounded or subcordate, margin sharply serrulate, apex acute. Inflorescences solitary; male distal, a cymose panicle, 2-7 cm; female inflorescence proximal, shorter. Male flowers reddish, pedicellate, in bud obovoid, ca. 1.5 mm; perianth lobes 4, connate 1/2 of length, subapically corniculate; stamens 4; rudimentary ovary small. Female flowers subsessile, in bud ca. 0.5 mm; perianth lobes connate at base, unequal, abaxial lobe cymbiform, longer, subapically corniculate; staminodes 3, scale-like, oblong. Achene brownish, obliquely ovoid, ca. 0.8 mm, compressed, smooth. Fl. Jun-Sep, fr. Sep-Oct.
Wet places of the mixed forests; ca. 2900 m. S Xizang [N India, Nepal, Sikkim].