 The spores are roughly ellipsoid to roughly spherical , and typically measure 7 – 8 @.@ 5 by 6 – 7 µm . The ornamentation on the spore surface is amyloid ( staining blue to blue @-@ black in Melzer 's reagent ) and finely wart @-@ like , with each wart ranging to 0 @.@ 5 – 0 @.@ 7 µm high . The warts are interconnected by thin ridges , but the ridges do not form a complete reticulum . The hilar appendage ( the part of a spore once attached to the basidium via the sterigma ) ranges in shape from narrowly obtuse to somewhat conical ; the plage is not very distinct , but has an amyloid spot . The basidia ( spore @-@ bearing cells in the hymenium ) are 35 – 50 by 8 – 11 µm , club @-@ shaped , and bear mainly four , but sometimes two long ( 6 – 10 µm ) sterigmata . 
