Local saxicolous lichen on exposed cairns (yellow species) with Pertusaria otagoana (white).
Spore produced at the end of hyphae on a distinctive "root like" structure
Septate
Melzers and thymol blue
Found growing in a pond margin nearby to the Orēti River. Total length ~1100mm, culm ~670mm. Leaves ~6mm wide, double folded, minutely scabrid on margins and keel. Utricles appear plano-convex, white nerves, ~3mmx~1.5mm. Beaks bifid, glabrous orifice, crura. Awns scabrid.
Saw where it said Tree Cave on Google Earth so checked it out. Prostrate macrocarpa in the dunes with kid caves under the low branches