These caps (the largest about 4 mm across) were growing out from the underside of a fallen, well-rotted eucalypt branch in a suburban garden. Each cap is attached directly to the wood by its upper surface, above the point where the gills come close to converging. In the photo you see very young specimens, close to ball-like, as well as a number that are well past their prime and becoming sludge-like messes. Visually, you could go as far as saying this belongs to either Resupinatus or Hohenbuehelia but further identification requires microscope work. For the moment, Resupinatus applicatus is the best pigeon-hole for this fungus but, according to a PhD thesis of 2015, DNA evidence suggests that there are 2 or more applicatus-like species of Resupinatus in Australasia.