 The teeth are slender , cylindrical and <unk> ( <unk> ) , less than 5 mm ( 0 @.@ 20 in ) long , and become shorter closer to the cap edge . They are crowded together , with typically between three and five teeth per square millimeter . <unk> @-@ white initially , they age to a grayish @-@ brown . The stem is thick , very short , and often deformed . It becomes bulbous where it <unk> the ground , and may root into the soil for several centimeters . Although it may reach up to 5 cm ( 2 @.@ 0 in ) in total length , and is 1 to 3 cm ( 0 @.@ 4 to 1 @.@ 2 in ) wide , only about 0 @.@ 1 to 1 cm ( 0 @.@ 0 to 0 @.@ 4 in ) appear above ground . The upper part is covered with the same teeth found on the underside of the cap , whereas the lower part is hairy and often <unk> debris from the forest floor . The odor of the fruit body has been described as " mild to disagreeable " , or , as Banker suggested in his original description , similar to <unk> nuts . 
