Herbs, perennial, wiry, glabrous, dioecious or very rarely monoecious. Stems erect or ascending. Leaves more numerous towards base of stems, usually leafless in upper parts; stipules with margins deeply lacerate into numerous irregular setiform lobes; lamina orbicular to ovate, spathulate, elliptic or linear, up to c. 25 mm long, up to c. 7 mm wide; base tapered to petiole; margins flat, recurved or revolute and entire or coarsely toothed; apex acute or obtuse and shortly subulate. Flowers clustered in axils of upper leaves or at leafless nodes. Male flowers 4-or 5 (6)-merous; stamens 8–10; filaments to c. 1.6 mm long; anthers 0.4–0.7 mm long. Capsules ellipsoidal, to c. 2.2 mm high, ± smooth.
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