182 THE POLYPORAOEAE OF WISCONSIN. 



PLATE XIII. 

 Polyporus. 



Fig. 44. — Polyporus graveolens Schw. a, surface of plleoll; &, section. On 



oak. Mauston. 

 Fig. 45. — Polyporus volvatus Peck, a, surface of pileus and mycelial plug 



from hole of bark borer; 6, section; c, lower surface of "volva," 



showing opening; d, pores. Hazelhurst, August. 

 Fig. 46. — Polyporus letiilinus Fr. a, pores; 6, section. On birch. Bangor, 



August. 

 Fig. 47. — Polyporus irumalis Fr. a, pilei; 6, pores. Bangor, October. 

 Fig. 48. — Polyporus lentus Berk. Photograph from dried specimen. The stipe 



was straight when collected. Dodge. Blue Mounds, June. 

 Fig. 49. — Polyporus circinatus Fr. a, section; 6, pores. Dodge. Algoma. 



