Herbs ?perennial, glabrous. Flowering stems solitary, simple, erect, 15-25 cm. Leaves opposite or 3-or 4-verticillate; pseudopetiole 4-6 mm wide; leaf blade rhombic-oblong, 20-33 × 8-12 mm, base abruptly narrowed, margin 4-8-dentate. Cyme paniculiform, 5-10 cm. Flowers unequally 5-merous; pedicel 3-8 mm. Sepals narrowly triangular, 1-1.5 mm, midvein conspicuous, base connate. Petals white, suboblong, 3-4 mm, base broad, apex acuminate, tip subobtuse. Stamens 10; antesepalous ones ca. 2 mm; antepetalous ones ca. 1.5 mm, inserted slightly above petal base. Nectar scales broadly spatulate, ca. 0.5 mm. Carpels erect, broadly ovoid, ca. 3 mm, adaxially minutely papillate, base broad. Styles slender. Follicles many seeded. Seeds ovoid. Fl. Jun.
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