Herbs slender, weak. Flowering stems 7-35 cm. Leaves often 3-verticillate or opposite, inconspicuously pseudopetiolate, usually persistent around middle of stem; leaf blade spatulate-oblong, 0.7-3.5 × ca. 0.7 cm, base narrowly cuneate, apex emarginate to obtuse. Cyme corymbiform, lax; bracts obovate-orbicular to suborbicular, 5-10 × ca. 6 mm. Flowers 5-merous. Sepals narrowly triangular-oblong, ca. 1 × 0.3-0.4 mm, apex obtuse. Petals yellow, narrowly oblong, 4-6.5 × 2-3 mm, apex obtuse. Stamens 10, slightly shorter than petals; antepetalous ones inserted 0.5-0.8 mm from petal base. Nectar scales 3, linear or linear-spatulate, 0.6-1 mm, apex emarginate or obtuse. Carpels 3, divergent, ca. 5 mm, base connate for 1.5-2.5 mm. Styles ca. 1 mm. Follicles divergent, 1-or 2-seeded. Seeds oblong-ovoid, ca. 0.6 mm, minutely mammillate. Fl. Jun-Jul, fr. Aug.
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