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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 reddish brown gland-dots, apex acute, base cuneate to rarely obtuse, margin conspicuously 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 towards 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.
Erect, soft shrub, 0.7-2.5 m high; freely branched, woody below; stems ascending, strigose, with longer hair at nodes. Leaves petiolate, firm-textured, often slightly rugose, ovate to oblong-elliptic, 74-190 x 35-115 mm, base cuneate to rarely obtuse, apex acute, margins conspicuously crenate-dentate; subglabrous to thinly pubescent. Inflorescence bearing 2-4 pairs of branches; rachis 250-370 mm long; verticillasters 6-flowered. Flowers bluish purple, rarely pink or white. Calyx 10-11 mm long when fruiting, glandular-puberulous towards base. Corolla 16-21 mm long; tube straight, increasing gradually towards throat; lower lip concave. Flowering time Mar.-May.
