Fig. 499 <X 6< 



squamosus a hundred and fifty 



POLYPORUS GRISEUS (Fig. 500). 

 Pileus fleshy, irregular, repand, color 

 pale smoky gray. Surface dull, minutely 

 silky. Stipe short, solid, usually thick and 

 obese. Flesh soft, spongy, grayish white. 

 Pores small. (Fig. 499 X6) irregular, 

 round with thick walls, grayish, almost 

 concolorous with the pileus. Spores round- 

 ish-elliptical, tubercular, 6-8 mic., white, 

 the same as the peculiar spores of the pre- 

 ceding plant. 9 



Polyporus griseus is a rather frequent plant 

 in the eastern United States, and a rare one 

 in Europe. In the United States the plant 

 was discovered to be a new species and named 

 Polyporus griseus by Peck. In Europe it is 

 stated that Linnaeus named it Boletus sub- 

 years ago. While T have little doubt of the 



Fig. 500 

 Polyporus griseus. 



9 The fact that these two plants have the same peculiar spores, and that these peculiar spores 

 are not known in any other species of Polyporus, would indicate they are the same species. A few 

 Polyporoids have echinulate, globose spores, but these are the only two to my knowledge with 

 tubercular spores. 



