Hypholoma acutum
A bright yellow mushroom that can be found thought out the year on fallen logs or stumps of deciduous trees. I have always had this down as but resent DNA sequencing show that this does not occur in New Zealand.
Common name: None
Found: Native forest
Substrate: Wood
Spore: BlackHeight: 50 mm
Width: 30 mm
Season: Autumn
Edible: Poisonous
Original public domain image from Flickr