Hi Matt, as far as I am aware B. bellidioides is not known from the North Island. It is more problematic in the South Island where both species occur and B. bellidioides has several variable forms, some of which are very hairy and/or tomentose. There is a rough treatment of this complex in Flora I, some of which are easy to recognise in the field, and some MUCH less easy to recognise. Add in B. traversii and hybrids with B. southlandicus and it gets even more complex!