Inocybe lilacina group
Found late September in the Yellowwood State Forest; Brown county.  Hard
wood forest; disturbed ground (trail edge).  
Formerly called Inocybe geophylla
var. lilacina and Inocybe geophylla var. lilacina. These mushrooms produce a
brown spore print.  Note mature specimen (lower right).
Description at
MushroomExpert.Com