An arrested fungi - a bolete that didn't mature
This at first look like a mutant amanita, but it is probably a bolete of some sort that has been arrested by wet then dry weather. The fact that there is some blue stainng suggests a bolete.
Unknown species in bushland off Gipps Close, Turramurra, Sydney, Mitchell Cres Reserve (Google Map http://maps.google.com/?ie=UTF8&ll=-33.743808,151.111826&spn=0.00645,0.010042&z=17&om=1), December 8-12, 2007, after heavy rain, always at the base of burnt wood on living stringybark trees. Trees along stream, in very moist conditions.
Size to 70mm, with what looks like juvenile cap of 25mm. 'Cap' (no gills present on any specimens) convex, separating easily from stipe, dry, white to beige and slightly cracked. Stipe very stout, solid with curling fragments, bulbous, with dry white surface fineley fibrillose. Stipe stains mid yellow upon cutting.'Cap' solid, stains faint blue upon cutting. Smaller specimens than this some days later were found to be slimey on the surface, and hollow inside with what looks like a spore mass, slighty foetid smell to pleasant fungi smell. No spores were detected however.