疏蓼 shu liao

Persicaria auriculata S. K. Dixit et al.; P. hastatoauriculata (Makino ex Nakai) H. Gross ex Nakai; P. praetermissa (J. D. Hooker) H. Hara; Polygonum auriculatum Makino (1903), not Meisner (1826), nor J. D. Hooker & Thomson (1886); P. birmanicum Gage; P. hastatoauriculatum Makino ex Nakai; P. thunbergii var. hastatotrilobum subvar. eciliolatum H. Léveillé; Tracaulon praetermissum (J. D. Hooker) Greene; Truellum hastatoauriculatum (Makino ex Nakai) Soják; T. praetermissum (J. D. Hooker) Soják.

Herbs annual. Stems decumbent or erect, 30-90 cm tall, branched, angulate, with sparse retrorse prickles along angles. Petiole 5-10 mm, prickly; leaf blade lanceolate or narrowly oblong, 4-8 × 0.5-1.5 cm, both surfaces glabrous or sparsely pubescent, abaxially sparsely prickly along midvein, base sagittate, margin ciliate, apex acute; ocrea tubular, 1-1.5 mm, membranous, base with retrorse prickles, apex oblique, usually shortly ciliate. Inflorescence terminal or in axils of upper leaves, spicate, lax, interrupted at base; peduncle dichotomously branching, glandular hairy in upper part; bracts funnel-shaped, usually each 2-4-flowered. Pedicels longer than bracts, 3-4 mm, glabrous. Perianth pinkish, 4-parted; tepals broadly elliptic, 3-4 mm. Stamens 4 or 5, included. Styles 3, connate to below middle. Achenes included in persistent perianth, dark brown, dull, subglobose, weakly trigonous at apex, ca. 3 mm. Fl. Jun-Aug, fr. Jul-Sep.

Marshy areas, streamsides; 1400-1800 m. Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hubei, ?Hunan, Jiangsu, Jiangxi, Taiwan, Xizang, Yunnan, Zhejiang [Bhutan, India, Japan, Korea, Nepal, Philippines, Sri Lanka; Australia].