Growing on shaded bluffs on steep alpine ridge. I don't know this genus well, but thought this looked like the best bet.
Am fairly sure is Convolvulus fractosaxosa but this doesn’t seem to be an option here. On rocky steep slope under kowhai in very dry shrubland / tussock land at Deep Creek
Growing on rock bank
Suspect Madeira vine?
The species I'm referring to: narrow, rounded, mottled brown leaves with blunt ends and a needle tip.
Growing in a small dark hollow in mature rimu forest. Only 1 plant seen.