Native fern, possibly Microsorum pustulatumMicrosorum species are robust ferns with bold, divided foliage that is quite dramatic, often with decorative raised 'pimples' along the length of the fronds. The one I grow is, I think, Microsorum pustulatum (ht 50 cm), sometimes called kangaroo fern, a native species found in rainforests. It grows from a creeping rhizome forming an impressive clump, and thus is an excellent filler. This fern grows best in full or partial shade. Like most ferns, it enjoys a moist, well-drained soil, rich in organic matter. However, they can tolerate some dryness once established, especially if mulched well. They will appreciate the occasional deep soaking in summer and a spray of water over its foliage every so often. They can be grown in a pot. This fern is frost sensitive. Propagation is by dividing the rhizomes in autumn or winter.
I'd love to know the proper name if I have this wrong here! One alternative possibility is Phymatosorus diversiflorus.