Annuals 6-12 cm tall. Stem ascending to erect, branched from base, glabrous. Leaves widely spaced; petiole tube 1-2 mm; leaf blade obovate, 5-8 × 2-3 mm, shorter than internodes, margin narrowly membranous and smooth or ciliolate, apex rounded, veins indistinct. Pedicel 1.7-4 cm, exserted from upper leaves, glabrous. Calyx narrowly obconic, 9-10 mm; lobes triangular, 1.5-1.7 mm, margin narrowly membranous and smooth, apex acute, midvein strongly keeled and decurrent into conspicuous wings of calyx tube. Corolla blue to blue-purple, with short blackish streaks in throat, narrowly tubular, 1.8-2 cm; lobes ovate-elliptic, 3-3.5 mm, margin entire, apex obtuse; plicae broadly oblong, 2-2.5 mm, margin laciniate, apex truncate. Stamens inserted at middle of corolla tube, equal; filaments 3-4.5 mm; anthers linear-ellipsoid, 1.4-1.6 mm. Style 1.5-2 mm; stigma lobes semiorbicular. Capsules linear-ellipsoid, 1-1.3 cm; gynophore to 5 mm. Seeds brown, linear-ellipsoid, 1-1.2 mm. Fl. and fr. Sep.
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