Plants perennial, creeping, rhi-zomatous. Stems decumbent and ascending, branched, smoothly 4-angled, 10–40 cm, glabrous. Leaves sessile; blade narrowly elliptic, elliptic-lanceolate, or oblanceolate, 0.5–2(–3) cm × 2–10(–13) mm, base cuneate, margins thin with reticulate venation, entire, apex acute, glabrous, slightly ciliate basally. Inflorescences axillary with 1–5-flowered cymes in mid and distal axils of foliage leaves; bracts lanceolate, ca. 1 mm, scarious with green midrib. Pedicels 5–30 mm, glabrous. Flowers ca. 6 mm diam.; sepals 5, 3-veined, lanceolate-triangular, 2.5–3.5 mm, margins scarious, apex acute, glabrous; petals 5, 1.5–3 mm, shorter than (rarely equaling) sepals, blade apex 2-fid almost to base, with widely divergent lobes; stamens 10; styles 3, ca. 1 mm. Capsules green, ovoid, 2.5–3.5 mm, equaling sepals, apex broadly acute; carpophore absent. Seeds pale reddish brown, ± reniform, 0.3–0.4 mm diam., with small tubercles. 2n = 24.
