These small (15 mm height, cap 5 mm diameter) were growing on a rotten branch across a stream. They had a green tinge, especially in center of cap.
Very near the site of the observation at https://inaturalist.nz/observations/241817246.
possibly chocolate button woodtuft (Hypholoma brunneum
Hypholoma brunneum, growing on wood in mixed Nothofagus forest
Native forest, don't know what type of tree the fallen log was
iNatting with @glebglub, @invertebratist, and @samuelamaris