1 Criteria unique to a single species 2 Hollow stalk 3 Stalk with a ring, veil or gaiter 4 Usually glandular stalk, viscous cap 5Rough stalk 5a Wrinkled, pitted, bumpy or significantly cracked cap 5b Smooth cap, flesh does not change when cut 5c Smooth cap, flesh turns red, brown or blue 5d Smooth cap, whitish flesh turns grey-violet 6Flesh changes colour when cut to blue, pink, red or brown 6a Partial colour change to blue 6b Total, rapid colour change to blue 6c Partial colour change to pink, red or brown 7White flesh that do not change when cut 7a Stalk reticulate in at least the upper part 7b Non-reticulate stalk 8 Yellow, reddish or brownish cap or stalk, flesh that does not change when cut 9 Boletes to identify