Lavender is a semi-shrub or dwarf shrub, with branches and stellate villi, which is dense in the young part; The old branches are grayish brown or dark brown, and the cortex is stripped in strips, with long flower branches and short regeneration branches. The leaves are linear or lanceolate. The leaves on the flower branches are large and distant, 3-5 cm long and .3-.5 cm wide, covered with dense or sparse gray stellate villi, which are gray or olive green when dry. The leaves on the regeneration branches are small and clustered, which are not more than 1.7 cm long and about .2 cm wide, and are densely covered with gray stellate villi, which are gray when dry, with dull tips.

The cymbals usually have 6-1 flowers, most of which are clustered into discontinuous or nearly continuous spikes at the top of the branches. The spikes are about 3(5) cm long, and the peduncle is about 3 times as long as the inflorescence itself, which is densely covered with stellate fluff. Bracts rhombic-ovoid, apex acuminate into subulate, with 5-7 veins, often rusty when dry, stellate tomentose, bracteoles inconspicuous; Flowers short-pedunculate, blue, densely covered with gray, branched or unbranched villi. Calyx ovoid tubular or nearly tubular, 4-5 mm long, 13 veins, nearly hairless inside, 2-lipped, 1 tooth of upper lip is wider and longer, and 4 short teeth of lower lip are equal and obvious. The corolla is about twice as long as the calyx, with 13 veins. The outer surface is covered with the same hair as the calyx, but the base is nearly hairless. The inner surface is covered with glandular hair at the throat and the brim, and the middle part is hairy. The brim is 2-lipped, the upper lip is straight, 2-lobed, and the lobes are large and round, and overlap each other slightly. The lower lip is spread, 3-lobed, and the lobes are smaller. Stamens 4, inserted above the trichomes, not overhanging, long anterior pair, flat filaments, glabrous, anthers hairy. Style hairy, compressed at apex, ovoid. Disk 4-lobed, lobes opposite to ovary lobes.