Found growing in Taupo Swamp, Plimmerton....
Hi John, looks like one of the native jasmines/Parsonsia. No idea what species unless flowering/fruiting
I brought a seed pod home, one day on the window sill and its burst open...
John - you cannot reliably identify Parsonsia without flowers - and ideally close ups of the stamens and stigma to show whether they are exserted or not
(JPG format, max 500kB)