Herbs perennial, 25--35 cm. Roots slightly spiniform, often multicrowned. Stems sparsely caespitose, ascending, apically slightly villous. Basal leaves narrowly oblanceolate, 7--12 × 0.7--1.5 cm, both surfaces and margin glabrous, midvein prominent, base attenuate into long petiole, apex acute; cauline leaves narrowly lanceolate, 6--8 cm × 5--10 mm, glabrous, base slightly clasping, apex acuminate. Cymes 2--5-flowered; flowers slightly nutant. Pedicel 1--3 cm, densely glandular hairy; bracts linear-lanceolate, 1--1.5 cm, glandular villous. Calyx campanulate, 2--2.5 cm × 7--10 mm, loose in fruit; longitudinal veins dark green, violet glandular hairy; calyx teeth triangular-ovate, 5--8 mm, margin membranous, apex obtuse. Androgynophore 3--4 mm, glabrous. Petals lilac, 2.3--2.5 cm; claws nearly cuneate, glabrous, auricles orbicular; limbs exserted beyond calyx, elliptic, ca. 10 × 4--5 mm, deeply 4-lobed; medial lobes narrowly elliptic, margin entire; lateral lobes spreading, linear, small; coronal scales oblong, 2-or 3-toothed. Stamens included; filaments glabrous. Styles included. Capsule ovoid, 1--1.4 cm, shorter than calyx. Seeds 2--2.5 mm, winged. Fl. Aug--Sep, fr. Oct.
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