Annuals 2-6 cm tall. Stems ascending, branched from base, glabrous. Basal leaves in rosette or withered at anthesis; petiole 1-2 mm; leaf blade ovate-orbicular, 1.2-3 cm × 7-10 mm, margin cartilaginous and smooth, apex rounded with a recurved tip, veins 3-5, distinct, and slender. Stem leaves 2 or 3 pairs, widely spaced; petiole tube 1.5-2 mm; leaf blade spatulate to obovate, 4.5-6 × 2-3 mm, shorter to slightly longer than internodes, margin of upper leaves indistinctly membranous, apex obtuse to rounded with a recurved tip, midvein indistinct. Flowers few. Pedicel 3-4(-20) mm, glabrous. Calyx narrowly obconic, 6-7 mm; lobes narrowly triangular, 2-2.5 mm, margin narrowly membranous, apex acute, midvein distinct. Corolla blue-purple, with blackish stripes and spots in throat, funnelform, (1.3-)1.4-2 cm; lobes ovate, 2.5-3 mm, margin entire, apex obtuse; plicae ovate, 2-2.5 mm, margin entire or denticulate, apex obtuse. Stamens inserted just below middle of corolla tube, unequal; filaments 4-5 mm; anthers ellipsoid, 0.8-1 mm. Style 2.5-3 mm; stigma lobes linear. Capsules narrowly obovoid, 6-8 mm; gynophore to 5 mm, stout. Seeds dark brown, ellipsoid, 0.9-1.1 mm. Fl. and fr. Jun-Aug.
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