Hebeloma sinapizans (Paul.: Fr.) Gill

   spore 11-14 x 6.8-8 mm

    Conical projection into the hollow of stem

       cheilocystidia about 70-100 mm long

  This mushroom resembles to Hebeloma crustuliniforme オオワカフサタケ.  According to Breitenbach & Kranzlin in Fungi of Switzerland, old stem of H. sinapizans has hollow and conical projeection from pileal fresh into the hollow exists.