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.
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