Annuals 20-35 cm tall. Stems ascending to erect; branches spreading, angled, glabrous. Basal leaves withered at anthesis. Stem leaves widely spaced; leaf blade broadly ovate to cordate, 0.5-1.6 × 0.6-1.6 cm, shorter than internodes, base rounded to cordate, margin serrulate, apex acute, veins 3-5. Flowers terminal, solitary, sessile. Calyx narrowly obconic, 1.2-1.5 cm; tube membranous, angled, smooth, papillate to puberulent along angles; lobes subulate, 2-3 mm, apex acuminate, midvein prominent, minutely hispid outside, and decurrent into angles of calyx tube. Corolla pale blue to blue, tubular to funnelform, 2.5-3.2 cm; lobes lanceolate to ovate, 0.9-1.1 cm, margin entire, apex acuminate to acute; plicae lanceolate, 3-4 mm, margin denticulate, apex acuminate. Stamens inserted at basal part of corolla tube, unequal; filaments 1-1.2 cm; anthers narrowly ellipsoid, 2-2.5 mm. Style 9-10 mm; stigma lobes linear. Capsules ellipsoid, 2-2.5 cm; gynophore to 2 cm. Seeds dark brown, ellipsoid, 0.8-1 mm, wingless.
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