Prostanthera linearis, the Narrow-leaved Mint-bush is a Mint Bush, found in New South Wales, Australia. It grows from one to three metres in height. Flowers may be white or mauve. The distribution is from Milton in the south to Gosford in the north. The habitat is in eucalyptus forest, often by streams. Soils may be based on sandstone or gravel. Unlike other mint bushes, this species is only slightly aromatic.The specific epithet linearis refers to the thin leaves.