Thanks Peter, I had assumed that if there ever was one then it had been lost. Also, being only found on an isolated ocean rock, it seems unlikely that many Maori were ever aware of it and of course they never cultivated it or transplanted it to the mainland. My reason for asking about them now is because a Kaumatua insisted that it was known as 'Tauwhata' after he saw me selling them at the Kawakawa market recently, but after googling the name I can still find no reference to it. I would like to confirm whether it's genuine or did he just wish to appear more knowledgable than a 'Pakeha' nurseryman...?