Herbs annual. Stems much branched from base upward, ca. 15 cm tall, white pubescent. Petiole of basal leaves 1.8-3.4 cm; leaf blade ovate, 0.9-1.6 cm × 6-12 mm, papery, minutely strigose, base rounded-truncate, apex rounded; stem leaves similar, with shorter petiole, sometimes ± cordate at base. Inflorescences 2-7 cm, axis minutely strigose; bracts basal, 2 or 3. Pedicel 1.5-3 mm, minutely strigose. Calyx lobes broadly lanceolate, ca. 1.2 mm, outside sparsely minute strigose, apex acute. Corolla white, glabrous, ca. 4 mm wide; tube ca. 1 mm; throat appendages trapeziform, ca. 0.2 mm; lobes suborbicular. Anthers ca. 0.3 mm. Nutlets subulate, trigonous-tetrahedral, smooth, glabrous, adaxial surfaces forming sharp angles; abaxial surfaces deltate, ca. 1.1 × 1 mm, sessile. Fl. and fr. Jul.
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