Perennial herbs with a strong hardly branched woody rootstock; overground shoots prostrate mat forming, much branched, up to 40 cm long, sometimes rooting at the nodes and via fragmentation forming clones (at least in type collection), internodes 5-15(20) mm; leaves broadly ovate to orbicular, 3-11 x 2-10 mm, round at base and apex, margins shallowly crenate; petioles 2-4 mm long. Flowers solitary (very rarely up to 3). Peduncles always shorter than 3 mm (usually 0.1-1.5 mm), primary cyme axis bibracteolate mostly in proximal half (only in very rare cases in distal half through elongation of proximal half to situate the flower correctly), pedicels 1-2.5 mm; bracteoles linear-lanceolate, c. 1.5 mm long, keeled. Calyx campanulate, 15-nerved; tube just under 2 mm long; teeth equal, triangular-lanceolate, c. 2 mm long, moderately to strongly bent outwards, not apressed thus upper part of the corolla tube appearing free. Corolla cobalt-violet, pubescent outside, glabrous in side except for two, very little prominent, sparingly pubescent ridges at the bottom of the tube; tube narrowly campanulate, 3-5 mm long; upper lip emarginate, 2 x 3 mm wide, lower lip curved downwards, 3-lobed, lateral lobes round, c. 2 mm in diameter, middle lobe emarginate 2 x 2-5 mm. Upper stamens c. 2 mm long, lower ones c. 3 mm long; anther cells divaricate. Style c. 6 mm long; stigma lobes very unequal, the posticous shorter. Nutlets c. 1.8 x 1.2 mm.
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Prostrate, mat-forming perennial herb; stems glandular-villous, 0.15-0.3 m long. Leaves shortly petiolate; blade broadly ovate to round, 5-11 x 4-10 mm, sparingly glandular-villous, rounded at apex and base, margin obscurely few-toothed. Flowers solitary in the axils of the upper leaves; pedicels 3-10 mm long with a pair of minute bracteoles. Calyx glandular-hispid, 4 mm long, deeply toothed. Corolla mauve, or white to yellowish with a deep purple throat, 6-7 mm long; tube 4-5 mm long; lobes 2 mm long.
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