Very fragile and accidentally broken before I realised what it might be. Under a log in dry sclerophyll forest. I cut the bud in cross section for photos.
In grassy clearing in rainforest immediately adjacent to Cape Hawke Lookout, south of Forster, NSW.
Found wild in suburban yard.
Hibbertia puberula ssp. puberula
At least 1 plant growing on edge of Cayleyi Track