 Relatively few boletes have an apical pore at the distal end of their basidiospores . The dark reddish @-@ brown , smooth spores of Porphyrellus <unk> are truncate with a thin @-@ walled depression . Some species of <unk> have spores with apical pores , but molecular analyses demonstrate that <unk> is only distantly related to Spongiforma . 
