Herbs perennial. Roots clustered, long cylindric. Stems diffuse, 20--80 cm, much branched, pubescent. Leaves sessile, gray-green abaxially, green or gray-green adaxially, lanceolate, 3--7 × 0.6--1.5 cm, base rounded to broadly cuneate, apex acuminate, pubescent with small tubercle-based hairs. Cymes few flowered, dense to rather lax; flowers erect, ca. 2 cm in diam. Pedicel 5--20 mm, densely pubescent; bracts lanceolate, herbaceous, villous. Calyx tubular-clavate, ca. 15 × 3.5 mm; longitudinal veins green or violet, densely spinose hairy, or ± evenly pubescent; calyx teeth triangular-lanceolate, margin membranous, ciliate, apex acuminate. Androgynophore 2--3 mm, glabrous. Petals pale red to white, 2--2.5 cm; claws slightly exserted, oblanceolate, glabrous; limbs broadly obovate, deeply bifid to middle; lobes obovate, with 1 small linear lobe on lateral side at base; coronal scales elliptic, margin entire. Stamens exserted; filaments glabrous. Styles exserted. Capsule narrowly ovoid, 1--1.2 cm, shorter than calyx. Seeds dark brown, reniform, ca. 1 mm, with long papillae abaxially. Fl. Jun--Jul, fr. Jul--Sep. 2n = 24*.
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