Description: Medium sized boletes (103mm
high), solitary to scattered, amongst grass, on
soil close to Quercus and a Russula sp. Pileus: Convex to broadly convex, smooth in
young specimens but with large cracks on
ageing, brown in colour, dry; diameter
50-72mm. Stipe: Solid, thicker near cap then straight but
tapering again near the base, fibrillose and
tearing, yellow near cap with a reddish brown
colour in the middle and discolouring towards
the base, 13 - 26mm diameter. Pores: Angular, very variable in size, 13mm
high, distant from stipe. Flesh: Lemon-yellow without colour changes
on cutting or bruising except on lower parts of
stipe which changes to a brown colour slowly. Colour tests: Ammonia (10%) and KOH (10%)
stipe base changes to brown.
The 'typical' X. chrysenteron is reported to
change colour to blue but this has not been
observed in any of the specimens. A specimen
similar to this species has been reported on
Boris Assyov's site.