 In deposit , the spores appear brown . <unk> them with a light microscope reveals finer details of their structure : they are roughly spherical but end abruptly in a small point , their surfaces are covered with small , <unk> @-@ like <unk> , and their size is between 5 @.@ 0 – 5 @.@ 3 by 4 @.@ 0 – 4 @.@ 7 µm . The spores are in amyloid , meaning they do not absorb iodine when stained with Melzer 's reagent . 
