Entoloma hochstetteri is a species of mushroom found in New Zealand and India. The small mushroom is a distinctive all-blue colour, while the gills have a slight reddish tint from the spores. The blue coloring of the fruit body is due to three azulene pigments. Whether Entoloma hochstetteri is poisonous or not is unknown.
The Māori name for the blue mushroom is werewere-kokako because the colour is similar to the blue wattle of the kōkako bird. This species was one of six native fungi featured in a set of fungal stamps issued in New Zealand in 2002.
Although many members of the genus Entoloma are poisonous, the toxicity of this species is unknown. It has been investigated to see if its blue colouring might be manufactured as a food dye.