Herbs. Roots spinose. Stems clustered, yellow, slender, 10--40 cm, glabrous or glandular hairy in 2 lines. Proximal cauline leaf blade saccate or orbicular-saccate; distal cauline leaf blade ovate-elliptic or lanceolate, 1--2 cm × 3--5 mm, base attenuate, apex acute. Cymes few flowered; bracts similar to leaves but smaller. Pedicel 1--2 cm. Sepals 5, lanceolate or orbicular, 4--5 × ca. 1.5 mm, glandular pubescent abaxially, base broadened, margin narrowly membranous, ciliate, apex obtuse. Petals 5, white, narrowly elliptic or obovate, apex 4-toothed. Stamens 10; filaments longer than sepals, those opposite sepals wider than others. Ovary ovoid; ovules 4 or 5. Styles 2, linear. Capsule globose, apex 4-lobed. Seeds orbicular, flat, obtusely tuberculate. Fl. and fr. Jul--Sep.
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