Not a great photo, but I'm fairly happy that this is Blechnum triangularifolium rather than B. novae-zelandiae (which is also present on the gorge's banks).
Amongst the leaves of Tmesipteris elongata.
With Amy Hawcroft and Eru Te Huia (DOC). Was on fallen tree trunk within river gorge. When disturbed by jet boat, flew up into trees along top of gorge.
Just a few stems present on a ponga, on the terrace where the campsite is. Tmesipteris elongata is the predominant Tmesipteris in the area.
Just a few plants in small gorge to north of DOC shelter/information signs. Spotted by Pat Brownsey.
Not a great photo, but (in the field) clearly P. laetus rather than P. arboreus.
With yellow inflorescences/flowers and roundish/cordate leaves. Pointed out by Amy Hawcroft.