Plectranthus madagascariensis Benth.

Perennial, often semi-succulent herb; stems procumbent, up to 1 m long (typical) or decumbent to erect, 0.3-0.45 m long (vars.), sparingly to densely and shortly tomentose, often with longer hairs and glandular hairs intermingled. Leaves petiolate; blade slightly succulent, drying thin to thickish in texture, ovate to subrotund, 15-30(-45) x 10-25 mm, upper surface strigose, under-surface medium to densely tomentose with reddish to brown gland-dots, apex obtuse to rounded, base truncate to cuneate, margin obscurely crenate to crenate-dentate; petiole 5-35 mm long. Inflorescence terminal to main stem and on side branches, simple or sometimes with 1-2 pairs of branches near the base; racemes 90-250 mm long; flowers in 3-8-flowered cymes, forming 6-16-flowered verticils spaced 5-20 mm apart; bracts 3 mm long, early deciduous. Calyx 4-5 mm long at fruiting stage, gibbous at the base, glandular-scabrid and gland-dotted, shape as in P. dinteri. Corolla white or mauve to purple, often reddish gland-dotted on the lips, 5-18 mm long; tube bent about the middle; lower lip boat-shaped, longer than the tube. Stamens free at the base, about as long as the lower corolla lip.

Rocky places and on cliffs at relatively high elevations.

Can be grown by cuttings or seedlings.