Herbs 10-15 cm tall, somewhat succulent. Stems terete, ascending, unbranched or rarely branched, pubescent. Leaves cauline; petiole 5-8 mm, pubescent; leaf blade elliptic, oblong, or oblong-ovate, 2.5-4 × 0.8-1.7 cm, abaxially pale green and glabrous except pubescent along veins, adaxially green and glabrous, secondary veins 6 or 7 on each side of midvein, base cuneate to rounded, margin undulate, apex obtuse. Racemes terminal or axillary, to 7 cm, 4-7-flowered; rachis sometimes branched at base, slightly pubescent; bracts linear, ca. 2 × 0.4 mm; bracteoles subulate, ca. 1 × 0.3 mm. Pedicel ca. 2 mm. Calyx 5-6 mm; lobes linear, subequal, margin sparsely hirsute. Corolla white, ca. 1 cm, glabrous; lobes oblong, ca. 2 × 2 mm, subequal. Stamens with longer pair ca. 3 mm and shorter pair ca. 2 mm; filaments strigose; anther thecae ellipsoid, ca. 1 × 0.7 mm. Ovary ca. 1.8 mm, glabrous; style ca. 8 mm, glabrous; stigma 2-cleft. Capsule oblong, ca. 6 mm, compressed, glabrous. Fl. Feb-Mar, fr. Aug.