Velvet roll-rim 
Violet Bitter Bolete 
Violet-grey bolete 
Weeping bolete 
Wet rot 
Xanthoconium affine 
Xanthoconium purpureum 
Xerocomellus amylosporus 
Xerocomellus atropurpureus 
Xerocomellus chrysenteron 
Xerocomellus truncatus 
Xerocomus ferrugineus 
Xerocomus hortonii 
Xerocomus illudens 
Yellow-cracked bolete 
Yellowfoot bolete 
Zeller's Bolete