Erect or straggling, perennial herb, 0.25-1.00 m high; stems glandular-pilose with long multicellular and gland-tipped hairs. Leaves petiolate, thin-textured, broadly ovate to ovate-deltoid, 30-100 x 25-80 mm, base broadly truncate and shortly attenuate, apex acute to abruptly acute, margins coarsely crenate-dentate; subglabrous to thinly pubescent. Inflorescence: rachis 60-150 mm long; verticillasters 2-6-flowered. Flowers sky-blue to deep blue. Calyx 6 mm long when fruiting, sparsely glandular-puberulous. Corolla 8-10 mm long, sparingly pubescent; tube deflexed and expanding, not markedly saccate at base, enlarging towards throat; lower lip boat-shaped, curved upwards. Flowering time Oct.-May.