Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Mycenaceae
Genus: Mycena
Mycena is a large genus of small saprotrophic mushrooms that are rarely more than a few centimetres in width. They are characterized by a white spore print, a small conical or bell-shaped cap, and a thin fragile stem. Most are grey or brown, but a few species have brighter colours. Most have a translucent and striate cap, which rarely has an incurved margin. The gills are attached and usually have cystidia. Worldwide there are over 33 species are known to be bioluminescent, creating a glow known as foxfire.
These tiny (5 mm cap) Mycena parsonsii were growing on a live Metrosideros robusta vine on the Te Henui Walkway, New Plymouth (May).
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Thanks to Wikipedia for text and information: https://creativecommons.org/licenses/by-sa/3.0/