Annual or short-lived perennial herb, c.0.15–0.3 m tall; stems ± fleshy, erect or ascending, moderately pubescent with short recurved hairs and mostly also longer spreading hairs. Leaves subsessile or shortly petiolate, rather fleshy; blade oblanceolate, narrowly obovate, elliptic, 25–50 × 8–20 mm, ± fleshy, moderately hairy, apex rounded or obtuse, base cuneate, margin dentate, crenate or subentire. Inflorescences dense and spike-like; bracts large, broad, early deciduous; cymes 3(–4) flowered, subsessile; pedicels suberect and recurved in the apical part, 1–3 mm long in the fruiting stage. Fruiting calyx broad, 3.5–4.5 mm long, densely villous inside the throat; upper lip very broad, concave, decurrent; lower lobes 1.5–3 mm long, almost as long as the lateral lobes. Corolla 7–11 mm long, blue or violet; lower lip 3–5 mm long, much longer than the upper lip. Stamens connate. Nutlets c. 1 × 0.9 mm, black, glossy, producing mucilage when wet.