Small tree to a height of about 9 m, occasionally a shrub; branches terete, conspicuously lenticellate, glabrescent, young twigs slightly flattened and together with the petioles, the lower leaf surface and all parts of the inflorescence densely stellate pubescent. Leaves broadly lanceolate, sometimes obovate, up to about 8 x 3 cm, occasionally larger in coppice growth and shade specimens, coriaceous, discolorous, dark green, glossy and sometimes rugose above, generally whitish below with felted stellate hairs that are sometimes partly deciduous, dotted with yellow glands above and below, apex acute, mucronate, base narrowly or broadly cuneate, margin entire or serrulate; petiole 3-5 mm long. Inflorescences many-flowered, up to about 3 cm long; pedicels about 3 mm long. Bracts small. Calyx coriaceous, strongly ribbed, stellate pubescent and gland-dotted; tube broadly campanulate, 2.5-3 mm long, lobes deltoid, about 2 mm long. Corolla about 8 mm long and as broad, coriaceous, pouch strongly ribbed, slightly dorsoventrally compressed, yellow spotted and streaked scarlet inside and with a scarlet blotch above the point of insertion of the anticous filaments, densely stellate-pubescent and gland-dotted outside and on the inside of the lobes, otherwise glabrous, strongly glandular inside the anticous face. Stamens: anticous filaments about 4 mm long, exserted at anthesis, the posticous.
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Small tree, shrub or scrambler, 1.5-10.0 m high; stellate hairs present on many parts. Leaves lanceolate or narrowly obovate, bicoloured. Flowers in terminal and axillary cymes. Corolla bilabiate, upper lip erect, bilobed, lower lip a much inflated deep pouch, mouth open, yellow with dark reddish marks or buff-coloured centre. Flowering time Nov.-July.