Herbs, annuals, prostrate, the branches ca 30-40 cm long, finely pubescent with small ? curved hairs, or glabrous. Leaves ovate to ? deltoid, acute, crenate-serrate along the distal margins, the bases obtuse, some truncate or rarely attenuate, to 6 cm long and 3 cm wide, glabrous, or the lower surface pubescent with short hairs; subsessile to petioles ca 1 cm long on lower leaves. Inflores-cences verticils, 6-10-flowered, pubescent with glandular-capitate hairs, the bracts broadly ovate and long-acuminate, or rhomboid, ca 2-3 mm long, pubescent. Flowers with pedicels ca 1-2.5 cm long; calyx tubular, ca 2-4 mm long at maturity, with glandular-capitate hairs, bilabiate, the upper lip mostly 5-9-veined; corolla tubular, ca 2.5 mm long, blue with white streaks, naked within, the upper lip ca 1.2-1.8 mm long, the lower lip weakly 3-lobed, ca 1.5-2 mm long; stamens mounted on the corolla throat, the anthers slender, ca 1 mm long; style slender, the stigma 2-lobed, the lobes flattened. Nutlets smooth, ca 1.5 mm long, usually only 1 maturing.
Wet to dry thickets or fields, often in waste ground, especially about dwellings, or a weed in cultivated ground, mainly found at low elevations but extending to 2,500 metres in Guatemala.
Can be grown by seedlings. Seeds needs stratification.
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