Gleichenia rupestris

NPOS p.314 

This coral fern was helpfully marked on the Mueller track in the wildflower gardens. It was growing on sandstone near the base of a small cliff. The species wasn’t indicated, but from the description in NPOS I think it’s Gleichenia rupestris. The fronds are flat on the underside and are larger and flatter than the pouched coral fern, the stalks are hairless.

more info:

http://bie.ala.org.au/species/Gleichenia%20rupestris