Herbs perennial, 15--30 cm tall. Stems sparsely caespitose, ascending, simple, apically sparsely glandular hairy. Basal leaves narrowly oblanceolate, 4--10 cm × 5--10 mm, both surfaces glabrous, shortly ciliate, base attenuate into long petiole, apex acuminate; cauline leaves usually 2--4 pairs, narrowly oblanceolate to lanceolate, slightly clasping at base. Cymes 2--4-flowered. Pedicel 1--4 cm, densely glandular hairy; bracts lanceolate, densely white villous. Calyx campanulate, 1.1--1.4 cm × 5--7 mm, base rounded, margin membranous, ciliate. Androgynophore 1--2 mm, glabrous. Petals lilac, 1.7--2 cm; claws oblanceolate, glabrous, auricles orbicular; limbs exserted beyond calyx, orbicular, deeply bifid to middle, lobes entire or weakly laciniate; coronal scales broad, toothed. Stamens included; filaments glabrous. Styles included. Capsule ellipsoid-ovoid, 1--1.2 cm, shorter than calyx. Seeds 2--2.5 mm, minutely striate, grooved abaxially. Fl. Jul--Aug, fr. Aug--Sep.
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