Perennials, 8-25 cm tall. Stems erect, ascending, or creeping and rooting below middle, basally subglabrous, apically villous, often red-purple, branched or not. Leaves 4-6 pairs, evenly distributed to crowded apically on stem; lower petioles ca. 1 cm, upper shorter; leaf blade ovate to narrowly ovate, 2-5 X 1.2-3 cm, papery, glabrous, or puberulent, or puberulent only adaxially, base usually cuneate, margin dentate with teeth toward leaf apex, apex often acute. Racemes 1-4 pairs, axillary from upper leaves, lax, 2-7-flowered, 3-6 cm, axis and pedicels villous; peduncle 0.5-1.5 cm; bracts linear-lanceolate, shorter than pedicel, glabrous. Pedicel straight, 1-2 mm at anthesis, ca. 3 mm in fruit. Calyx 4-lobed; lobes linear-lanceolate, subequal, 3-4 mm at anthesis, elongated in fruit, glabrous. Corolla white or pale red, purple striate, rotate, ca. 1 cm in diam.; tube less than 1.5 mm; throat hairy. Stamens slightly shorter than corolla. Capsule pliciform-rhomboid, strongly compressed, 4-5 X 9-11 mm, base subtruncate or at an angle greater than 120°, margin apically sparsely ciliate with multicellular glandular hairs, emarginate. Style 2-3 mm. Seeds 2-10 per capsule, flattened, slightly convex, ca. 1.5 mm. Fl. Apr-May.
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