Pouzolzia pentandra (Roxb.) Benn.

Common in low hills of Punjab and N.W.F.Province up to 1000 meters, near ditches and water streams.

Herbs prostrate or ascending, often ± pendent at apex, or subshrubs to 50 cm tall, monoecious. Stems 4-angled, strigillose on ridges. Leaves opposite in lower stems, alternate in upper ones, becoming smaller and denser, stipules broadly ovate, ca. 1 mm; subsessile; leaf blade: in lower stem linear-lanceolate or oblong-elliptic, 0.9-5 × 0.5-1(-1.5) cm (in upper stem lanceolate or narrowly ovate, 0.6-4 cm), thinly papery; 3-veined, base rounded or subcordate, apex acuminate or acute. Glomerules bisexual, in upper stems. Male flowers: pedicel 2-3.5 mm; buds 2 mm in diam.; perianth lobes (4 or)5. Female flowers sessile: perianth tube ellipsoid, ca. 2 mm, longitudinally 2(or 3)-winged, apex indistinctly 2(or 3)-toothed. Achene black, ovoid, ca. 1.5 mm.

A perennial, erect to decumbent, up to 1 m tall, glabrous to sparsely hispid herb. Stem cylindrical below, angular above. Leaves opposite below, alternate and gradually smaller above, sessile or with upto 5 mm long petiole; lamina lanceolate or linear-lanceolate to oblong, 2-10 cm long, 0.5-1.8 (-2) cm broad, glabrous, subcordate or rounded at the base, margin entire, minutely spinulose, apex acute-acuminate or rarely obtuse; stipules ovate, 1-2 mm long, membranous. Flowers loosely clustered in upper leaf axils, greenish-white or pinkish-green; female sessile, male with 2.5-3.5 mm long pedicel. Calyx of male flowers 5-lobed, lobes shortly acuminate, abruptly incurved, ciliate, Stamens 5, c. 2 mm long. Achenes shining black, ovate, 1-1.5 mm long, acute, enclosed in 2-3-winged persistent calyx.

Guangdong, Guangxi, Hainan, Taiwan, Yunnan [Bangladesh, India, Indonesia, Myanmar, Pakistan, Papua New Guinea, Philippines Thailand, Vietnam].

Afghanistan, Subtropical Himalaya, India, Ceylon, China, Malaysia.

Distribution: Afghanistan, Pakistan, India, Java and Philipines.

150-900 m

Fl. Per.: June-September.

Moist places; 100-300 m.

Urtica pentandra Roxburgh, Fl. Ind., ed. 1832, 3: 583. 1832; Gonostegia pentandra var. akoensis (Yamamoto) Masamune; G. pentandra var. hypericifolia (Blume) Masamune; Memorialis pentandra (Roxburgh) Weddell; M. pentandra var. hypericifolia (Blume) Weddell; Pouzolzia hypericifolia Blume; P. pentandra (Roxburgh) Bennett; P. pentandra var. hypericifolia (Blume) Masamune.

Gonostegia pentandra là loài thực vật có hoa trong họ Tầm ma. Loài này được (Roxb.) Miq. mô tả khoa học đầu tiên năm 1869.

五蕊石薯（学名：Gonostegia pentandra）为荨麻科石薯属下的一个种。