Hi Pat,
The site is some private property known as Motuhara Bush in Plimmerton, Porirua. MC Mcdonald botanised the area in 1978. (Is that Maggy Wasilieff's maiden name?). I have just had another look through all the material I have in the Brownsey book and the Flora descriptions, I think it may be A. raddianum as the ultimate lamina segments are divided. I also think that maybe the indusia notches are shallower than A. aethiopicum, as depicted in the Brownsey illustration.
What do you think?
Cheers Matt