Me pēnei te tohu i te whārangi:
Patrick Brownsey, 'Ngā whakaahua, ngā rauemi katoa', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/ferns-and-lycophytes/media (accessed 10 December 2023)
He kōrero nā Patrick Brownsey, i tāngia i te 24 Sep 2007