 The species can be differentiated from the similar I. cookei by its " irregular , lumpy spores " . It is also similar to I. rimosa , but differs in the presence of a bulb . Another species that can be differentiated by the lack of a bulb is I. numerosigibba . 
 The species can be differentiated from the similar I. cookei by its " irregular , lumpy spores " . It <a href='drop_aux' title='1'><mark>is</mark></a>also similar to I. rimosa , but <a href='uninflect' title='2'><mark>differs</mark></a> in the presence of a bulb . Another species <a href='null_relcl' title='3'><mark>that</mark></a>can be differentiated by the lack of a bulb <a href='drop_aux' title='4'><mark>is</mark></a>I. numerosigibba . 
The species can b differentiated from the similar I. cookei by its " irregular , lumpy spores " . It also similar to I. rimosa , but differ in da presence of a bulb . Another species can be differentiated by tdalack of a bulb I. numerosigibba .