Annuals 5-30 cm tall. Stems purple, erect, branched, densely papillate. Petiole equal or slightly longer than leaf blade, slender; leaf blade spatulate to obovate, 1-3.5 cm × 4-13 mm, base narrowed, margin scabrous, apex rounded, veins 1-3. Inflorescences elongated with terminal and many axillary clusters. Flowers sessile or subsessile, 5merous. Calyx tube narrowly obconic, 6-9 mm; lobes narrowly elliptic, unequal, 3 larger and 8-10 mm, 2 smaller and 4-6 mm, base narrowed, margin scabrous, apex obtuse, midvein prominent. Corolla pale yellow-white to pale blue, with blackish streaks and spots, tubular, (1.5-)2.2-2.6 cm; lobes ovate, 3-5 mm, margin entire, apex obtuse; plicae broadly ovate, 0.7-1 mm, symmetric, margin slightly 2cleft or denticulate. Stamens inserted at middle of corolla tube, usually exserted, unequal, 3 longer and 1-1.2 cm, 2 shorter and 7-9 mm; anthers ellipsoid, 1-1.5 mm. Style linear, 2-3 mm, much shorter than ovary; stigma lobes narrowly oblong. Capsules narrowly ellipsoid, 1.1-1.3 cm; gynophore 1.1-1.3(-3.5) cm, slender. Seeds brown, subglobose, 0.5-0.7 mm. Fl. and fr. Aug-Nov.
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