科名：蓼科 Polygonaceae

属名：蓼属 Polygonum

《中国植物志》第25(1)卷071页
  82.双凸戟叶蓼
  Polygonum biconvexum Hayata in Journ. Coll. Sci. Univ. Tokyo 25: 184. 1908; Park in Mem. N. Y. Bot. Gard. 47: 35. 1988.——P. hastatotrilobum Meisn. var. lenticulare Danser in Bull. Jard. Bot. Buitenz. ser. 3. 8: 227. 1926. ——P. thunbergii Sieb. et Zucc. f. bicovexum (Hayata) Liu et al.台湾植物志2: 284 图版297. 1976.——Persicaria biconvexa (Hayata) Nemoto in Fl. Jap. Suppl. 169. 1936.——Truellum bicovexum (Hayata) Sojak in Preslia 46: 145. 1974.
  一年生草本。茎上升，下部近平卧，节部生根，分枝，具纵棱，沿棱具倒生短皮刺，高30-80厘米。叶戟形，长4-7厘米，宽2-4厘米，顶端渐尖，基部戟形，两面具刺毛，疏被短星状毛，边缘具缘毛，中裂片宽椭圆形或卵形，通常基部稍缢缩，侧生裂片较小卵形，顶端急尖或钝；叶柄长2-4厘米，具倒生皮刺；托叶鞘筒状，通常顶部具叶状翅，边缘近全缘，具粗缘毛。花序头状，顶生或腋生，花序梗具腺毛；苞片披针形，顶端渐尖，具缘毛，通常每苞内具2花；花被4深裂，淡红色，花被椭圆形，顶端钝，长2.5-3.5毫米；雄蕊5-6,成2轮；花柱2, 中下部合生，柱头头状。瘦果宽卵形，双凸镜状，褐色，无光泽，长约3毫米，包于宿存花被内。花期7-8月，果期9-10月。
  产台湾。生山坡林缘、沟边湿地，海拔1500-2500米。模式标本采自台湾。印度尼西亚（苏门答腊）也有。

《Flora of China》 Vol. 5 (2003)
Polygonum biconvexum  Hayata
双凸戟叶蓼   shuang tu ji ye liao
Persicaria biconvexa (Hayata) Nemoto; Polygonum hastatotrilobum Meisner var. lenticulare Danser; P. thunbergii Siebold & Zuccarini f. biconvexum (Hayata) Liu et al.; Truellum biconvexum (Hayata) Soják.
Herbs annual. Stems ascending, prostrate at base, 30-80 cm tall, branched, retrorse prickly along angles. Petiole 2-4 cm, often narrowly winged, retrorsely prickly; leaf blade hastate, both surfaces bristly, sparsely shortly stellate hairy, base nearly truncate to cordate, margin ciliate; middle lobe broadly elliptic or ovate, usually contracted near base, margin ciliate, apex acuminate; basal lobes ovate, small, apex acute to obtuse; ocrea tubular, 5-10 mm, apex truncate, sometimes apex with herbaceous wing, ciliate. Inflorescence terminal or axillary, capitate; peduncle glandular hairy; bracts lanceolate, 3.5-4 mm, apex acuminate, ciliate, each 2-flowered. Pedicels shorter than bracts, 2-3 mm. Perianth pinkish, 4-parted; tepals elliptic, 2.5-3.5 mm, apex obtuse. Stamens 5 or 6, in 2 whorls. Styles 2, connate to below middle; stigmas 2, capitate. Achenes included in persistent perianth, brown, opaque, broadly ovoid, biconvex, ca. 3 mm. Fl. Jul-Aug, fr. Sep-Oct.
Slopes, forest margins, wet ditches; 1500-2500 m. Taiwan [Indonesia (Sumatra)].