Perennial herb with hairy stems. Leaves to about 6 cm long, lanceolate to ovate, hairy on both surfaces, stalked, margins saw- or round-toothed. Flower clusters of wellspaced whorls along the spike, with bracts longer than the flowers. Flowers with calyx hairy outside, corolla hairy outside, white, pink or lilac.
var. piperascens Malinv. from Japan and Korea has leaves gland-dotted and stalked, and long-pointed calyx lobes.
Source: (2002). Lavandula. In: . Horticultural Flora of South-eastern Australia. Volume 4. Flowering plants. Dicotyledons. Part 3. The identification of garden and cultivated plants. University of New South Wales Press.