Description: Solitary, large agaric, under grass close
to Olive trees and reeds. Pileus: Flat, fleshy with white velar remnants at edge
of cap and with brown coloured fibrils on cap, coloured
darker near the centre, diameter 110mm. Flesh whitish
but without colour change on cutting. Stipe: Thick and fleshy with flaring ring, tapering
towards the base. Diameter 24mm, height 145mm.
Flesh white changing immediately on cutting to red
(above ring) and bright yellow at the base. Base of
stipe has yellowish streaks before cutting. Yellow
colour on cutting fades after some time. Gills: Free, crowded, chocolate coloured.
10% KOH: Cap - colour change to yellow; Stipe - cap
area colour change to red, ring area to base a change
to bright chrome yellow colour. Smell: Cap - mushroomy; Stipe (on cutting) - faint
but persistent, slightly acrid, not phenolic and not
Microscopy: Basidia: 4-spored. Pileipellis: Irregular thin hyphae with encrustations. Cheilocystidia: Absent. Pleurocystidia: Absent. Gill trama: Subregular Spores: Ellipsoid, dark brown without germ pore,
smooth. 5.1-6.3µm x 3.9-4.7µm width, Q: 1.25-1.45,
This specimen appears close to A.