Weak-stemmed perennial herb, freely branched, rhizomatous; stems 0,15—0,3 m long, slender, quadrangular, glabrous to sparingly pilose. Leaves petiolate; blade lanceolate to lanceolate-hastate, 10—30 x 3—6 mm, glabrous or nearly so, gland-dotted beneath, apex acute, base obtuse to rounded, margin entire, often inrolled; petiole 1 — 3 mm long. Inflorescence slender, lax, 5 — 12 mm long; pedicels 2—3 mm long. Calyx puberulous to hispidulous, at flowerÂing 1,5—2 mm long, enlarging to 3 mm long in fruit. Corolla small, 4,5—6 mm long, variously coloured, violet to red or white with purple spots, the lower lip often paler than the upper; tube ascending, 3—4 mm long, widening to 2 mm wide at the throat; lips subequal, 1,5—2 mm long. Stamens reaching the apex of the upper lip, the lower pair attached about 2 mm above the base of the tube. Nutlets 1 mm long, pale brown, minutely tuberculate. Fig. 4.