brain mushroom

a poisonous gyromitra; the surface of the fertile body is smooth at first and becomes progressively undulating and wrinkled (but never truly pitted); color varies from dull yellow to brown

有毒なシャグマアミガサタケ類；結実部の表面は初め滑らかで、次第に波打ちしわが寄る（ただし真の窪みにはならない）；色は鈍い黄色から褐色まで多様