Undershrub, 1-1.5 m, very fragrant. Stem and branches slender, nearly terete. Leaves membranaceous, elliptic or ovate, 4-10 by 3-6 cm, acute or obtuse, base cuneate or shallowly cordate, entire; margin elsewhere crenate-serrate; petiole 1-3 cm. Flowers in verticillasters arranged in spurious spikes disposed in large terminal panicles 15-20 cm long. Bracts rhomboid, sessile, 2.5 mm long and wide. Pedicels 2-3 mm. Calyx campanulate, curved, 3-3.5 mm long, in fruit 4-5 mm, 5-toothed, teeth all subulate, claw-like curved, densely covered with long greyish arachnoid pubescence. Corolla white with violet-tinged upper lip, 7-8 mm long, tube shorter than the calyx, limb 2-lipped, the lips pubescent and with yellow glands outside. Stamens included in the lower lip of corolla. Nutlets rounded, flattened, c. 1 mm Ø.
Between grass, herbs and seedling trees (amongst which Casuarina, Harmsiopanax, Trema, Wightid) on old lavastreams (rédjéngans), in exposed places, locally common, 1100-1450 m. Fl. April-July, Nov.