Herbs, monoecious, pale green, 0.5-3 dm, glabrous. Stems simple or branched, erect or ascending, terete or subangular. Leaves alternate or the proximalmost opposite, blade green, oblong, lanceolate, or ovate, proximal leaves lanceolate to rhombic-ovate, 10-30 × 5-13 mm, base rounded or hastately to cuneately narrowed to petiole, margin nearly always entire (some hastate), apex acute or rounded, rarely obtuse, glabrous on both sides. Flowers in rather loose spiciform, axillary or terminal inflorescences. Staminate flowers 5-merous. Pistillate flowers enclosed by paired bracteoles. Fruiting bracteoles green, midvein never impressed, sessile or with stipes 0.5-1.5 mm, broadly ovate to rhombic-ovate, 3-5 mm, distinct nearly to base, base rounded or more often hastate-cuneate, margin entire or sparingly toothed, apex acute or acuminate, faces smooth. Seeds small, not or only moderately dimorphic: black, convex, 1.5-2 mm wide, lustrous, or light brown or olivaceous, compressed, 2.5-3 mm wide, duller, with subbasal, spreading radicle. 2n = 18.
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