Description from Flora of China
Plants to 2 m tall. Bark dark gray, irregularly fissured, exfoliating, young branches densely white stellate-tomentulose. Leaves tufted on branches, sessile to short petiolate; leaf blade 1-2.5 cm × 1-2 mm, leathery, adaxially somewhat shiny, subglabrous, abaxially densely white stellate-tomentose, base attenuate, margin entire, revolute, apex obtuse. Calyx ca. 4 mm, densely white stellate tomentose and glandular outside, upper lip subcircular, teeth of lower lip ovate-triangular. Corolla blue-purple, less than 1 cm, sparsely pubescent outside, tube slightly exserted, apex of upper lip 2-lobed, lobes ovate, middle lobe of lower lip constricted at base into claw, lateral lobes oblong. Fl. Nov.
An aromatic ornamental plant.
Introduced in China ca. 220 A.D. [Africa, SW Asia, Europe]