Perennial herb to about 1.5 m tall and with a woody rootstock. Leaves of 3 lanceolate leaflets, the central one the largest, hairy below,margins toothed. Flower clusters of leafless terminal whorls, the lowermost whorl often spaced away from the rest. Flowers with calyx tubular to bell-shaped and with 13-15 veins and 5 equal teeth. Corolla funnel-shaped, to 2 cm long, 2-lipped, the upper lip of 2 lobes, lower of 3, with the central one longest, white, pink or violet. Stamens curved, hardly protruding. [C. triphylla Moench]
Source: (2002). Lamiaceae. 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.