Prostanthera lasianthos, commonly known as the Victorian Christmas bush, is a large shrub or small tree of the mint family, Lamiaceae, which is native to Queensland, New South Wales, Victoria and Tasmania in Australia. It grows up to 10 m (35 ft) high but is usually much less and is found in wet sclerophyll forests, often beside creeks. Its flowers, which appear in profuse sprays, are about 2 cm long and white or pale lilac, with purple and orange blotches in the throat. They appear in late spring and summer, and specifically around Christmas time in Victoria. The fragrant, toothed leaves are 4 to 12 cm (sometimes 15 cm ) long and about 1.5 cm wide.