Hypholoma acutum
(Cooke) E. Horak 1971
Description:
A bright yellow mushroom with a brown centre can be found throughout the year on stumps and standing decaying trees. I have always had this down as Hypholoma fasciculare, but recent DNA sequencing shows that this does not occur in New Zealand. 
Common name: Sulfur tufts
Found: Native and urban forest
Substrate: Standing decaying wood
Spore: Black
Height: 40 to 60 mm
Width: 25 to 35 mm
Season: Autumn
Edible: Bittter tasting and poisonous
Macro images:
Hypholoma acutum
Scale bar
Scale= 10 mm.
 
Hypholoma acutum
Scale bar
Scale= 10 mm.
 
Hypholoma acutum
Scale bar
Scale= 10 mm.
 
Hypholoma acutum
Scale bar
Scale= 10 mm.
 
Scale bar
Scale= 10 mm.
 
The Hidden Forest
Forest Fungi