Herbs perennial. Stems slender, 10-15 cm. Leaves opposite; leaf blade spatulate-obovate to broadly obovate, 1-2 × 0.5-1 cm, base attenuate and shortly spurred, apex rounded and emarginate. Cyme usually 3-branched, 3-6 cm in diam., many flowered. Flowers sessile, unequally 5-merous. Sepals lanceolate to narrowly oblong, 2-5 × 0.7-2 mm, base shortly spurred, apex obtuse. Petals yellow, linear-lanceolate to lanceolate, 6-8 × 1.5-2 mm. Nectar scales oblong, ca. 0.6 mm, apex obtuse. Carpels oblong, 4-5 mm, base connate. Follicles divergent. Seeds brown, minute. Fl. May-Jun, fr. Jul.
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