Asplenium australasicum has been recognised as having 2 forms. The most generally seen form, which occurs on Norfolk and Lord Howe Island as well as on the Australian mainland in NSW and Queensland, is Asplenium australasicum (J.Sm.) Hook. f. australasicum. br/However another form of the species has been recognised for Norfolk Island and is known as Asplenium australasicum (J.Sm.) Hook. f. robinsonii (F.Muell.) P.S.Greenbr/br/Asplenium australasicum forma. robinsonii appears to be a sport which now only exists in cultivation, and sporelings from this form mostly revert to the type form.br/I was unable to find the latter form in my travels on Norfolk Island.