Annuals 3-7 cm tall. Stems ascending to erect, branched from base, glabrous or papillose. Petiole tube 1-1.5 mm; leaf blade spatulate to obovate, (2-)4-7 × (1-)1.5-3.5 mm, margin smooth to papillate, apex rounded, midvein distinct. Pedicel 4-7 mm, surrounded by upper leaves to rarely exserted. Calyx tubular, 0.8-1.4 cm; lobes triangular, 2-3 mm, margin narrowly membranous and smooth, apex acute, midvein strongly keeled and decurrent into conspicuous wings of calyx tube. Corolla blue, basally greenish yellow, tubular, (1-)1.5-2 cm; lobes ovate-elliptic to ovate, 2.5-3(-4.5) mm, margin entire, apex obtuse; plicae ovate, 2-2.5(-3.5) mm, margin erose, apex obtuse. Stamens inserted at middle of corolla tube, equal; filaments 2-5 mm; anthers narrowly ellipsoid, 1.2-2 mm. Style 1.5-2 mm; stigma lobes oblong. Capsules narrowly ellipsoid, 0.9-1.1 cm; gynophore to 1.5 (-4.2) cm. Seeds brown, ellipsoid, 0.5-0.7 mm, winged on 1 side.
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