190 THE POLYPORACEAE OF WISCONSIN. 



PLATE XVII. 



Boletus. 



Fig. 59. Boletus Clintonianus Peck, c, narrow form. Madison campus, d, 

 pores. Crandon, August, e, section, old specimen; /, pores. 

 The Dells, September. 



Fig. 60. Boletus Americanus Peck, a, mature thinner type; Z>, thicker type, 

 showing tufts of fibrils at margin of pileus; c, younger speci- 

 men, showing remnants of veil on margin of pileus and 

 splotches of gluten on stipe; d, pores of mature specimen. Dorw- 

 ard's Gorge, September, e, pores of younger specimen. Madi- 

 son, August. 



