Perennial, soft, branched herb 0.4-0.75 m tall; stems spreading-ascending, finely glandular-puberulous with a fringe of longer hairs at the nodes. Leaves petiolate; blade thin-textured, broadly ovate to sub-rotund, 50-150 x 45-140 mm, with scattered multicellular hairs, under-surface with yellowish to brownish gland-dots, often slightly sunken, apex obtuse to acute, base truncate to subcordate, margin coarsely and deeply serrate-dentate, teeth 6-16 mm long, usually with small secondary teeth; petiole 40-130 mm long. Inflorescence simple or with a pair of branches near the base, racemes 60-150 mm long; flowers in sessile or subsessile (1-)3-flowered cymes, forming 2-6-flowered verticils 10-30 mm apart. Calyx up to 8 mm long in fruiting stage, puberulous. Corolla 8-10 mm long, white flushed with mauve-pink and with a few purple dots on the upper lip, fringed with white hairs; tube scarcely deflexed, expanding and saccate at the base, narrowing towards the throat; upper lip 4-6 mm long; lower lip boat-shaped, 4-5 mm long.
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