Prostrate, creeping, small herb; stems much branched, rooting at the nodes, sub-quadrangular, minutely strigose or more or less clothed with appressed white hairs, sometimes nearly glabrous; leaves opposite, subsessile, obovate-spathulate, obtuse at apex, cuneate at base, decurrent into petioles, serrate in distal half, entire towards base, glabrescent; flowers minute, whitish-pink or purplish white, sessile in densely packed, subglobose to pedunculate spikes; bracts ovate, shortly acute or acuminate, apiculate, sparsely ciliate; bracteoles absent; calyx cupular, minutely 2 lobed, unequally divided, embracing the fruit; corolla purple-white, upper lip short, erect, bifid, 3-lobed, of which the middle lobe largest, tube slender, straight or curved, mouth 2-lipped; stamens 4, didynamous, included, anthers unappendagd; ovary 2-locular, ovule solitary in each locule, style short, stigma oblique; drupes flat, nearly dry, splitting into 2, 1-seeded pyrenes, enclosed by fruiting calyx.