Hypogymnia australica
Hypogymnia australica is a species of foliose lichen in the family Parmeliaceae. Found in Australia, it was formally described as a new species by lichenologist John Elix in 1989. The type specimen was collected from the Great Dividing Range in New South Wales (about 12 km east of Bungendore) at an altitude of . Here it was found growing on a species of Leptospermum. The lichen has a foliose (leafy), light grey thallus that is loosely attached to its bark substrate and reaches up to  in diameter. It contains the secondary compounds atranorin, chloroatranorin, and physodic acid as major metabolites. References

australica
Lichen species
Lichens described in 1989
Lichens of Australia
Taxa named by John Alan Elix