Stems erect, not branched or with a single branch above, 9-18 cm tall, glabrous below, sparsely short hispid above. Basal leaf 1; lower stem leaves long petiolate; upper stem leaves subsessile; petiole 0.8-6 cm, sparsely short hispid; leaf blade elliptic-ovate to ovate, 1.5-10 × 1-2.8 cm, sparsely short strigose, base broadly cuneate to cordate-cuneate, apex mucronate. Flowers opposite leaves on middle or upper part of stems. Pedicel of lower flowers thin, 2-4 cm; pedicel of upper flowers 2-10 mm, sparsely short pubescent. Calyx ca. 1.8 mm, parted nearly to base; lobes narrowly triangular, glabrous outside, sparsely pubescent inside, apex subacute, markedly 3-veined. Corolla blue, glabrous; tube ca. 1.2 mm; appendages lunate, ca. 0.2 mm; limb ca. 4.5 mm wide, glabrous; lobes suborbicular. Anthers narrowly oblong, ca. 0.5 mm. Nutlets unknown. Fl. Jul.
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