Perennial herbs with a strong hardly branched woody rootstock; overground shoots prostrate and mat forming, moderately branched, up to 92 cm long, occasionally rooting at the nodes; internodes 5-40 mm; leaves broadly ovate to orbicular, 3-21 x 2-21 mm, obtuse to rounded at base, rounded to obtuse at apex, margins crenate; petioles 2-8 mm long. Flowers solitary to often 3-4 per cyme. Peduncles 4-19 mm long, primary cyme axis bibracteolate mostly in distal half, but secondary cyme axes usually in proximal half, pedicels 2-7 mm long; bracteoles linear-lanceolate, up to 2 mm long, keeled. Calyx sub-campanulate, 15-nerved, 3-4.5 mm; tube 1.5-2 mm long; teeth equal, triangular with the distal half linear (appearing filiform in dried specimens), 1.5-2.5 mm long, equally long as free part of corolla tube, straight, rarely slightly bent outwards at the ends, appressed, thus upper part of corolla tube appearing embraced by calyx lobes. Corolla (rarely) almost white to yellow, pubescent outside, glabrous inside except for two, little prominent, pubescent ridges at the bottom of the tube; tube narrowly campanulate, c. 5 mm long; upper lip emarginate, c. 2 x 3 mm, lower lip 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 parallel. Style c. 6 mm long; stigma lobes very unequal, the posticous shorter. Nutlets c. 1.8 x 1.2 mm.
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