Soft shrub, 0.7-1.5 m high; freely branched; glandular-pubescent. Leaves petiolate, thin-textured, somewhat rugose, broadly ovate-deltoid, 60-100 x 40-60 mm, pubescent, base cordate, apex acuminate, margins regularly crenate-dentate. Inflorescence simple or laxly branched; rachis up to 300 mm long; verticillasters 6-flowered. Flowers whitish to pale mauve, upper lip with mauve-brown vertical lines. Calyx up to 7 mm long when fruiting, glandular-pubescent. Corolla 12-14 mm long; tube ± sigmoid; narrow and ascending, then deflexed and expanding at throat; lower lip shallowly boat-shaped. Flowering time Mar.-June.
A herb. It grows up to 1.5 m high. The crushed leaves have a lemon (citronella) scent. The leaves are 6-10 cm long by 4-6 cm wide. The flowers are in groups of 3. They are white to pale mauve.
Soft, citrus-scented, glandular-hairy perennial to 1.5 m. Leaves, ovate-deltoid, toothed. Flowers in racemes, calyx glandular-hairy, corolla sigmoid, whitish to mauve.