 <unk> Corner defined the varieties M. <unk> var. <unk> and var. <unk> in his 1994 publication on <unk> mushrooms of <unk> , a <unk> region <unk> the boundary of the <unk> and <unk> <unk> . The variety <unk> ( named after its type locality , <unk> ) has a cap margin that is not <unk> , little or no odor , and cheilocystidia with shorter processes . It was found growing on the dead wood of <unk> <unk> , a stone oak tree in the beech family . Variety <unk> , found in <unk> , has spores that are almost spherical . 
