STROBILOMYCES. II7 



It is a question whether we have any species of the Boletinus 

 growing in our Lehigh Valley in Pennsylvania. Some years 

 ago I found a specimen which I considered Boletinus poroso, 

 but after comparing it with exchange specimens I found that I 

 had been mistaken — so I have none to record for the present. 

 The identification of the different species of Boleti is trouble- 

 some. Fries himself admitted that no genus gave him as much 

 trouble as the genus Boletus. 



Gknus XLIV. STROBII^OMYCES. Berk. 



Hymenophore even, tubes not easily separable from it ; 

 large, equal. Pileus and stem distinctly squarrose, squamose, 

 flesh tough. 



S. strobilaceus. Berk. 



Pileus, convex, rough with dark umber scales, two to 

 three inches broad, margin veiled, flesh white, changing to red. 



Tubes, adnate, white, angular, changing to red when 

 bruised. 



Stem, tapering upwards, sulcate at the apex, floccose- 



tomentose. 



Spores, dark brown, .0004 to .0005 inch. 

 Common in all our open woods. 



S. floccopUS. Vahl. 



Pileus, convex, pulvinate, covered with an sereolate fascicu- 

 late-squarrose, squamose tomentum, cinereous, at length 

 blackish, margin veiled. 



Tubes, large, grayish, depressed around the stem. 



Stem, stout, lacunose above, umber-tomentose below, four 

 to five inches long. 



Spores, globose, brown, .00036 inch broad. 



