Herbs perennial. Roots clustered, spiniform. Stems ascending, 20--50 cm, multibranched, pubescent, basally retrorsely pubescent, apically glandular hairy. Leaves often with short, sterile axillary branches; leaf blade lanceolate-linear, 1.5--6 cm × 1.5--4(--9) mm, both surfaces densely pubescent, margin ciliate, sometimes revolute, midvein prominent, base cuneate, apex acute. Dichasial cymes lax, densely glandular hairy, lateral dichasia sometimes present. Pedicel 5--20 mm, densely glandular hairy; bracts lanceolate-linear, glandular hairy. Calyx tubular, ca. 15 × 2.5 mm, densely to sparsely glandular hairy, veins violet; calyx teeth triangular, margin membranous, ciliate, apex acute. Androgynophore 3--5 mm, glabrous. Petals pale red, ca. 2 cm; claws slightly exserted beyond calyx, oblanceolate, glabrous, auricles obscure; limbs obovate, bifid, 1-toothed on each lateral side, lobes ovate; coronal scales orbicular, apex obtuse. Stamens exserted; filaments glabrous. Styles exserted. Capsule ovoid, ca. 1 cm, shorter than calyx. Seeds reniform, grossly tuberculate and slightly grooved abaxially. Fl. May--Jun, fr. Jun--Jul.
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A herb. It keeps growing from year to year. The roots are in clusters. The stems are 20-50 cm tall. They are branched and hairy. The leaves are narrowly sword shaped and 2-6 cm long by 2-4 mm wide.