A cowslip (Caladenia flava), a very common flower that is pretty much always the first orchid out where present. The other Caladenia spp. are generally bigger, showier and present flowers higher up (around waist level) and I love all of them, but I have a soft spot for this gorgeous, rich yellow flower.
The cowslips I’m familiar with must be a primrose.
I love orchids, though. It’s wonderful to see native orchids growing as they will.