Description from Flora of China
Persicaria strigosa (R. Brown) Nakai; Polygonum bodinieri H. Léveillé & Vaniot; Tracaulon strigosum (R. Brown) Greene; Truellum strigosum (R. Brown) Soják.
Herbs annual. Stems erect or decumbent, 50-100 cm tall, branched, angulate, with retrorse prickles along angles. Petiole 0.5-2 cm, with recurved prickles; leaf blade elliptic or lanceolate, 6-10 × 1-3.5 cm, abaxially usually glabrous, with retrorse prickles along midvein, adaxially glabrous or sparsely shortly strigose, base weakly cordate, truncate, or subsagittate, margin ciliate, apex acuminate or acute; ocrea tubular, 1.5-3 mm, membranous, with dense retrorse prickles at base, apex truncate, long ciliate. Inflorescence spicate; peduncle branched, densely pubescent, sparsely glandular hairy; bracts elliptic or ovate, 2-3 mm, usually strigose, each 2- or 3-flowered. Pedicels shorter than bracts, 1-2 mm, glabrous. Perianth white or pinkish, 5-parted; tepals elliptic, 2-4 mm. Stamens 5-7, included. Styles 2 or 3; stigmas capitate. Achenes included in persistent perianth, dark brown, dull, nearly orbicular, biconvex or trigonous, ca. 3 mm. Fl. Aug-Sep, fr. Sep-Oct.
Wet valleys, forests; 100-2000 m. Fujian, Guangdong, Guangxi, Guizhou, ?Jiangsu, ?Xizang, Yunnan [Bangladesh, Bhutan, India, Indonesia, Malaysia, Myanmar, Nepal, New Guinea, Sikkim, Thailand, Vietnam; Australia].