Xanthorrhoea field

Squid-friend Margaret Ruwoldt snapped the photo for today’s Earth Science Picture of the Day. It’s a field of xanthorrhoea, a slow-growing grass tree that displays tremendous bursts of growth in the aftermath of natural disasters such as bushfires. Margaret has more photos from this set on Flickr.
One Person has left comments on this post
There are about 15 species of Xanthorrhoea in Australia. I am supposing that this is X. australis. Does anyone recognise the plant habit or anything else that might give a clue as to species?
Margaret is a polymath. Taking award winning photographs is just part of an extra-ordinary and over-full life.