Flesh changes colour when cut to blue, pink, red or brown
Total, rapid colour change to blue
In the company of coniferous or deciduous trees.
Fruitbodies yellow in all parts and quickly turning blue when bruised.
Yellow caps turning blue quickly when bruised.
Tubes yellow, adnate, depressed near the stipe at maturity, turning blue when cut.
Pores and Pore Surface
Tube surface yellow quickly blueing when bruised, pores circular, very small, 4 per mm.
Nearly equal to widened or narrowed downward.
Stipe yellow, reddish or blackish at the base, non reticulate, blueing when bruised.
Yellow flesh, quickly turning blue when cut and red towards the base of the stipe with age
FLESH: towards orange beige with KOH AND NaOH; towards grayish with FeSO4 and NH4OH.
STIPE: towards blackish brown with KOH and dark brown with NaOH; towards blackish gray with FeSO4.
TUBES: towards blackish brown with all four reagents.