Description: Medium sized boletes, solitary to
scattered in a citrus grove (oranges) on soil, in
shaded areas. Pileus: Convex to broadly convex, smooth and dry
(not sticky), initially reddish brown changing to
blackish goo with age; diameter about 60mm. Stipe: Yellowish near the apex darkening to red
towards the base, straight to slightly tapering,
solid. Pores: Angular, bright yellow but darkening with
age. Spore print: Brownish. Flesh: Bright yellow changing instantly to
blue-green -> blue, in all tissues on cutting or
bruising. Note areas eaten by slugs retain the
yellow colour. Colour tests: Iron sulphate and KOH - reverses blue colour
change;
Ammonia (10%) - reverses blue colour change but
colour of pores changes to brown.