Polygonum Linnaeus sect. Cephalophilon Meisner in N. Wallich, Pl. Asiat. Rar. 3: 59. 1832

Stems prostrate or decumbent to ascending or erect, branched, unarmed. Leaves: ocrea usually chartaceous, rarely coriaceous proximally and chartaceous distally, margins eciliate or ciliate; petiole usually winged, auriculate; blade usually with dark triangular or lunate blotch adaxially, broadly elliptic to ovate, base cordate, rounded, truncate, or cuneate, margins entire. Inflorescences terminal or terminal and axillary, capitate, uninterrupted. Flowers homostylous, articulation swollen or not; perianth urceolate or campanulate; tepals (4-)5, connate 3- 2 their length; stamens (5-)8; styles deciduous, 2-3, included, spreading.

Species ca. 16 (3 in the flora): introduced; Asia; introduced also in Europe, Africa, Pacific Islands.