Keith McDougall, the expert from the Office of Environment and Heritage, Queanbeyan, has confirmed that the trunkless Xanthorrhoea at Bungonia is concava.
Understanding which species occur within a bioregion and eliminating those which do not match with habitat and morphology is a good means at arriving to species level. X. glauca angustifolia and X. resinosa are the only other candidates in this area, neither of which resemble this specimen.