Aromatic shrub or small tree to about 6 m tall. Leaves narrow-ovate to ovate, 4-11 cm long, 1-3 cm wide, tip pointed, sometimes extended, margins usually toothed, hairless; stalk 0.5-1 cm long. Flowers in a terminal cluster. Calyx tube 2-3 mm long. Corolla 1-1.5 cm long, white to pale mauve with dark purple spots; late spring to early autumn.
Qld, NSW, Vic, Tas
Source: (2002). Origanum. 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.
Prostanthera lasianthos 'Kallista Pink'
Flowers clear pink in early summer.
Registered by the Australian Cultivar Registration Authority in 1980; in Your Garden Aug 1983.
Prostanthera lasianthos 'Mint Ice'
Flowers pure white.
Registered by the Australian Cultivar Registration Authority in 1989.