Erect soft shrub 0,7—2,5 m tall, freely branched, woody below; stems ascending, strigose, with longer hairs at the nodes. Leaves petiolate; blade firm-textured, often slightly rugose, ovate to oblong-elliptic, 60-170 x 40-100 mm, subglabrous to thinly pubescent, under-surface with redÂdish brown gland-dots, apex acute, base cuneate to rarely obtuse, margin conspicuÂously crenate-dentate; petiole 20-50 mm long. Inflorescence paniculate, 120—250 mm long; flowers in sessile, usually 3-flowered cymes forming usually 6-flowered verticils 5 — 15 mm apart. Calyx 10—11 mm long in fruiting stage, glandular-puberulous toÂwards the base, often suffused with purple. Corolla pale blue or mauve to bluish purple, rarely white or pink, 16—21 mm long; tube not deflexed nor expanded at the base, straight, increasing gradually to about 3 mm deep at the throat; upper lip 5—6 mm long; lower lip concave, 4—5 mm long. Stamens free, up to 15 mm long. Fig. 30: e.
