Bird’s Nest Fern
Asplenium australasicum
“A spectacular epiphytic fern with long, tough, radiating leaves” – NPOS p.306
Great! I’ve found another uncommon fern. It’s hardly fair with the Bird’s nest fern though, it stands out from most other plants in the bush with it’s bright yellow-green fronds and it’s distictive rosette habit.
This one was growing on the edge of a sandstone cliff in the bush out the back.

Bird’s Nest Fern growing on sandstone. Found this when I was out the back checking on the sewer leak.
Coral Fern ( G. microphylla )
Gleichenia microphylla
“Habit and Habitat as per G. dicarpa. Uncommon” – NPOS p.314
Yet another Coral Fern! Along with the Pouched Coral Fern (Gleichenia dicarpa) and Gleichenia rupestris, the G. microphylla completes the entire set of coral ferns found in Sydney, according to NPOS anyway.
G. microphylla has features of both G. rupestris and G. dicarpa. It had very fine small fronds that are a deep green colour and convex on the top like G. dicarpa. But on the underside they are flat or just slightly concave like G. rupestris.
Coral Fern ( G. rupestris )
Gleichenia rupestris
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.
Fishbone Fern
Nephrolepis cordifolia
“A fern with narrow erect fronds, often spreading over large areas.” – NPOS p.310
Everyone except me ( neighbors, mum ) seemed to know all about the fishbone fern. Even though it’s a native to Australia where it naturally occurs in Queensland and Northern NSW, it’s considered a weed in Sydney. It does tend to take over parts of the garden, especially places I’ve cleared of other weeds.
The plant sketches in NPOS are usually very good, but for the Fishbone Fern I didn’t think it looked like the plant I saw. I checked a few other sources to make sure I had the right plant.