Herbs perennial, basally crispate-puberulent to subglabrous, apically glandular hairy. Roots clustered, cylindric, fleshy. Stems diffuse, to 1 m, much branched. Leaves sessile, broadly ovate or ovate-lanceolate, 4--7 × 2--4 cm, glabrous or sparsely hairy abaxially and at veins adaxially, conspicuously 3-or 5-veined. Dichasial cymes lax and broad; proximal pedicels to 5 cm, subsequent ones much shorter, densely glandular hairy; bracts ovate-lanceolate, herbaceous, glandular pubescent. Calyx campanulate, 8--12(--13) × ca. 4 mm, base rounded, slightly inflated in late maturity, densely violet glandular villous at veins; calyx teeth triangular-ovate, subobtuse and shortly ciliate. Androgynophore 1--2 mm, glabrous. Petals ca. 1.5 cm; claws cuneate, glabrous, erose above; limbs violet or pale pink, 4-lobed; medial lobes narrowly orbicular; lateral lobes linear, small; coronal scales subsquarrose, margin dentate or entire. Stamens and styles exserted; filaments glabrous. Styles 3. Capsule ovoid, ca. 1 cm, shorter than calyx. Seeds reniform, with auricular pit. Fl. Jul--Aug, fr. Aug--Oct.
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