Herbs perennial. Roots conic, or numerous, spinose, and fleshy; primary one lepidote. Stems 1--3, erect or suberect, to 4 cm, white, yellow, or black villous. Proximal cauline leaves imbricate, lepidote; distal cauline leaf blade lanceolate or elliptic-lanceolate, 1--1.3 cm × 3--4 mm, both surfaces glabrous, tuberculate, base attenuate into petiole, margin ciliate or glabrous, apex subobtuse or acute. Flower solitary or cymes ca. 3-flowered; bracts leaflike, small. Pedicel ca. 1 cm, densely black nodose hairy. Sepals 5, orbicular-lanceolate, ca. 5 × 1--1.5 mm, margin membranous, ciliate, apex obtuse. Petals 5, white, obovate, ca. 1 cm, apex emarginate, often few toothed. Stamens 10, longer than sepals. Ovary ca. 2 mm. Styles 2, ca. 4 mm. Fl. Jul.
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