Annual herb; stems very slender, glabrous, pink or reddish, often forming dense twining masses. Scale lvs minute. Infl. a bracteate, sessile head or glomerule, usually 4-8 mm diam. at anthesis. Fls pink to white, sessile, 5-merous. Calyx deeply lobed, 1.5-2 mm long, broad-campanulate; lobes broadly rhombic-ovate or triangular, acute. Corolla 3-4 × c. 2.5 mm; lobes ?-1/2 length of tube, triangular or nearly so, patent, acute or acuminate. Scales < corolla tube, connate over the ovary, strongly fimbriate. Stamens = or slightly < corolla lobes. Styles and stigmas = or > ovary; stigmas linear or filiform. Capsule c. 2 mm diam., depressed-globose. Seeds 2-3, c. 1 mm long, trigonous, alveolate, ± asymmetric at base.