190 THE POLYPOBACEAE OF WISCONSIN. 



PLATE XVII. 

 Boletus. 



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

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

 Tlie Dells, September. 



Fig. 60. — Boletus Americanus Peck, a, mature thinner type; 6, 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 



