Description

Pileus: convex; 50 - 95 mm diameter; glabrous; greyish brown becoming black and splitting radially.

Stipe: cylindrical with a sub-bulbous base; 35 - 80 × 5 - 15 mm; white above, brown below; glabrous; large pendulous ring near apex.

Gills: free; white to reddish brown to start with, becoming brown.

Flesh: bright yellow in base of stipe when exposed to air.

Spore print: dark brown.

Notes: the yellow reaction in the stem and the strong smell of phenol place this in the ‘xanthodermae’ group of Agaricus that can cause serious illness if consumed.

Support

Growing in native forest under Araucaria andCasurina.

Localite

? 10 June 2017

Reference

Peterson K.R, Desjardin & Hemmes (1999) Agaricales of the Hawaian Islands. Sydowia 52: 204 – 257.