The spores are 7 – 9 by 5 – 6 @.@ 5 μm , broadly ellipsoid , smooth , and strongly amyloid ( it turns black when treated with Melzer 's reagent ) . The basidia ( spore @-@ bearing cells ) are four @-@ spored . The pleurocystidia ( cystidia on the gill face ) are not differentiated . The cheilocystidia ( cystidia on the gill edge ) are embedded in the gill edge and very inconspicuous , club @-@ shaped , 26 – 36 by 5 – 10 μm , and have tips that are covered with contorted projections that can be slender or thick . The flesh of the gills is homogeneous , and pale yellowish to dirty brown when stained in iodine . The flesh of the cap has a distinct pellicle , a well @-@ differentiated hypoderm ( a region of tissue immediately under the pellicle ) , and a filamentous tramal body ( gill tissue ) ; it is pale yellowish to sordid brownish in iodine stain .