The Hibbertia pedunculata/serpyllifolia complex has been split (Toelken, 2013) and this species is the most likely of 3 new species (+ horricomus and singularis) to be the one which is a common understorey species in Allocasuarina nana montane heath in Wadbilliga and Deua NPs. H. pedunculata and serpyllifolia are no longer considered to occur on the NSW south coast or tablelands.
Hibbertia pachynemidium is listed in the following regions:
Canberra & Southern Tablelands
Maps
Boro