Stems frequently branched from below, 6-20 cm tall, sparsely pubescent, usually glabrous below. Lower stem leaves petiolate; leaf blade spatulate to oblanceolate, 1.4-2.9 cm × 4-8 mm, base attenuate, apex rounded to obtuse; upper stem leaves sessile, elliptic to ovate, gradually reduced, 4-12 mm, abaxially glabrous, adaxially sparsely pubescent or glabrescent. Inflorescences several, crowded, or 1-flowered at apices of short branches. Pedicel 0.8-1 mm. Calyx blue, ca. 2 mm, parted nearly to base, glabrous outside, ciliate along margin, appressed pubescent inside. Corolla light blue, glabrous; tube (1.2-)1.8-2 mm; appendages nearly trapeziform, ca. 0.5 mm; limb 3.5-8 mm wide; lobes suborbicular. Nutlets ovoid, ca. 3 × 2 mm, sparsely short pubescent, finely tuberculate below; aperture narrowly oblong, ca. 2.8 mm; attachment scar at middle of adaxial surface. Fl. Jul.
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