Prostanthera clotteniana
Prostanthera clotteniana is a species of flowering plant in the family Lamiaceae and is endemic to tropical north Queensland.  It is a shrub with cylindrical, hairy branches, narrow egg-shaped leaves with the narrower end towards the base, and purple to pale lilac flowers.

Description
Prostanthera clotteniana is an erect shrub that typically grows to a height of  with hairy, stems. The leaves are narrow elliptic to narrow egg-shaped with the narrower end towards the base, dull green,  long and  wide on a petiole  long. The flowers are arranged singly in two to four leaf axils near the ends of branchlet, each flower with bracteoles  long near the base of the sepals. The sepals form a tube  long with two lobes, the lower lobe  long and the upper lobe  long. The petals are purple to pale lilac,  long and fused to form a tube  long, the lower central lobe  long and bilobed. The lower side lobes are  long and the upper lobes are  long and fused with a small central notch.

Taxonomy
In 1904, Frederick Manson Bailey formally described Hemigenia clotteniana in the Queensland Agricultural Journal and in 1905 described Prostanthera atroviolacea in the same journal, specimens of both plants collected near Herberton. In 2000, Anthony Bean considered the two names to be synonyms and raised the new name Prostanthera clotteniana in the journal Austrobaileya. The species was named "after F. E. Clotten, who furnished the funds for printing a general index to “The Queensland Flora”".

Distribution and habitat
Prostanthera clotteniana grows in dry woodland on steep, rocky slopes in the Ravenshoe–Atherton area of north-east Queensland where it is only known from seven sites. It was thought to be extinct until rediscovered in 1999.

Conservation status
This species is classified as "critically endangered" under the Australian Government Environment Protection and Biodiversity Conservation Act and the Queensland Government Nature Conservation Act 1992. The main threats to the species are inappropriate fire regimes and habitat disturbance caused by mining, illegal collection and weed invasion.

References

clotteniana
Flora of Queensland
Lamiales of Australia
Taxa named by Anthony Bean
Plants described in 2000
Endemic flora of Queensland