Description from Flora of China
Persicaria taquetii (H. Léveillé) Koidzumi; Polygonum minutulum Makino.
Herbs annual. Stems erect, prostrate or ascending at base, 30-50 cm tall, slender, glabrous, much branched, rooting at lower nodes. Petiole very short or nearly absent; leaf blade narrowly lanceolate, 2-4 cm × 3-6 mm, both surfaces sparsely pubescent, base narrowly cuneate, margin entire, apex acute; ocrea tubular, 5-6 mm, membranous, sparsely pubescent, apex truncate, cilia 3-5 mm. Inflorescence terminal or axillary, spicate, pendulous, to 10 cm, slender, interrupted, usually several spikes aggregated and panicle-like; bracts green, funnel-shaped, ca. 2 mm, margin long ciliate, each 3-5-flowered. Pedicels longer than bracts, slender. Perianth pinkish, 5-parted; tepals elliptic, 1.5-1.7 mm. Stamens usually 7, included. Styles 2 or 3, connate to below middle. Achenes included in persistent perianth, brown, shiny, ovoid, biconvex or trigonous, 1.2-1.5 mm. Fl. Aug-Sep, fr. Sep-Oct.
Wet valleys, along ditches, water sides; sea level to 400 m. Anhui, Fujian, Guangdong, Hubei, Hunan, Jiangsu, Jiangxi, Zhejiang [Japan, Korea].