Prostrate herb, us. much-branched, forming patches up to ± 20 cm. diam.; branches ascending at tips, obscurely to distinctly bifariously pubescent. Lvs opp., approximate, often overlapping, on petioles ± 1 mm. long. Lamina oblong-obovate to oblong to ovate-oblong to elliptic, us. several forms on same plant, glab., 6-12 X 3-6 mm.; margins remotely, obscurely denticulate to entire. Fls ± 5 mm. diam.; calyx deeply cleft, lobes lanceolate to narrow-obovate, ± 3 mm. long; petals shades of magenta to white, bifid to ± halfway. Capsules glab., pale green to reddish brown, sts purplish, (8)-10-20 mm. long; peduncles 5-10 mm. long, ± = lvs, sts up to 2 cm. long. Seeds very minutely densely papillose.

2n = 36

n = 18

Densely to loosely matted herb. Stems creeping and rooting at nodes or erect, 2-18 cm long, mostly glabrous but with lines of fine appressed or erect hairs decurrent from margins of petioles. Lamina of lf elliptic, 4-16 × 2-7 mm. Floral tube 0.4-1 mm deep, glabrous. Petals bright rose-purple, 2-5.5 × 1.2-2.6 mm. Capsule glabrous, 1.3-4 cm long; fruiting pedicel 0-6 cm long.