Prostanthera granitica, commonly known as the granite mintbush, is a species of flowering plant in the family Lamiaceae and is endemic to eastern Australia. It is a spreading shrub with egg-shaped leaves with the edges rolled under, and purple to violet flowers.
Prostanthera granitica is a spreading shrub that typically grows to high and wide and has densely hairy branches. The leaves are light green, hairy, egg-shaped with the edges rolled under, long and wide and sessile or on a petiole up to long. The flowers are arranged singly in upper leaf axils with bracteoles about long at the base. The sepals are long and form a tube wide with two lobes, the upper lobe long. The petals are purple to mid-violet, occasionally white, long. Flowering occurs from August to December.[1]
Prostanthera granitica was first formally described in 1905 by Joseph Maiden and Ernst Betche in the Proceedings of the Linnean Society of New South Wales.[2] [3]
Granite mint bush grows in heath and forest in rocky places, mainly on the tablelands, slopes and plains of New South Wales.[4]