Perennial herb, 0.2-0.5 m high; freely branched; stems decumbent, rooting at lower nodes, shortly pubescent. Leaves petiolate, thin-textured, ovate to subrotund, 40-65 x 40-60 mm, base truncate to abruptly attenuate, apex obtuse to rounded, margins obscurely crenate-dentate; sparingly pubescent, lower surface with many brown to reddish gland dots. Inflorescence simple or sparingly branched near base; rachis 80-250 mm long; verticillasters 2-6-flowered. Flowers mauve to violet, darker blotches on lips. Calyx glandular-hispidulous, up to 10 mm long when fruiting. Corolla: tube 12-15 mm long, expanding abruptly and forming saccate base, narrowing gradually at throat; lower lip concave. Flowering time Feb.-May.