Diffuse perennial, prostrate or trailing herb. Stem quadrangular, retrorsely softly pubescent at least on angles. Leaves ± sessile, 4 in a whorl, ovate-elliptic, 1-3 x 0.5-1.5 cm, acute, obtuse or mucronate, distinctly 3-nerved, not recurved, dotted and pubescent above, villous-pubescent beneath, sometimes on nerves and margins only. Inflorescence of terminal or axillary, divaricately or trichotomously branched cymes; peduncles and pedicels filiform; bracts foliaceous in pains, smaller than leaves, pedicel 1-3 mm long. Flowers white or yellowish, minute, c. 1.5 mm in diameter. Corolla lobes lanceolate, acute, one-nerved, c. 0.8 mm long. Fruits small, c. 0.5 mm, globose, covered with soft whitish hooked bristles.