Herbs perennial, 5--15(--20) cm, with procumbent stems, rooting at nodes. Stems sparsely caespitose, erect, simple, densely violet glandular hairy. Basal leaves ovate or narrowly oblanceolate, 2.5--5 cm × 7--13 mm, subglabrous to sparsely villous with long hairs, especially toward margin, apex acute or nearly so; cauline leaves 1 or 2 pairs, elliptic, smaller, 1--3 cm × 4--6 mm. Flowers 1--3, slightly nutant, erect after anthesis. Pedicel 2.5--3 cm, glandular villous; bracts lanceolate, glandular hairy. Calyx campanulate or cylindric-campanulate, membranous, saccate, 1.3--1.7 cm × 8--10 mm, densely glandular villous, umbilicate at base, open at apex, inflated in fruit, longitudinal veins brown or dark violet; calyx teeth broadly triangular, ca. 4 mm, weakly hairy, margin ciliate. Androgynophore ca. 3 mm, woolly-hairy. Petals exserted ca. 7 mm beyond calyx; claws pale red, exserted 2--3 mm beyond calyx, 1.3--1.4 cm × 5--6 mm, cuneate, with triangular-ovate auricles above, villous at base; limbs spreading, violet or dark violet, broadly ovate, ca. 5 mm, 4-lobed or deeply so, medial lobes with minute laciniae or round teeth; lateral lobes dentate or linear, smaller; coronal scales broadly cuneate, 1--1.5 mm, laciniate or dentate. Stamens slightly exserted beyond corolla throat; filaments villous at base. Styles not exserted. Capsule globose or ellipsoid, 7--10 × 6--8 mm, shorter than calyx, 5-toothed. Seeds brown, slightly flattened, ca. 1.5 mm, lustrous, abaxially faintly tuberculate. Fl. Aug--Sep, fr. Aug--Sep.
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