Polyporaceee 



Boletus, ules or points, radicating, tough, stuffed with greenish-yellow fiDe v 

 colored like the pileus. Spores unknown. 



Pileus 2-3 in. broad. Stem 4-5 in. long, 4-8 lines thick. 



Cespitose on decaying stumps. West Philadelphia, Pa. August. 

 Mcllvaine, 



Mr. Mcllvaine says that there were between twenty and thirty speci- 

 mens on and about an old stump and that they were as attractive to the 

 eye as a cluster of Clitocybe illudens. Peck, Bull. Torrey Bot. Club, Vol. 

 27, January, 1900. 



Excellent in flavor, rather spongy, but fine. 



HYPORHO'DII. Gr. somewhat rose-colored. 



Tubes adnate to the stem, whitish, then white-incarnate from the 

 rosy spores. 



In this tribe the tubes are at first whitish, but with the development 

 of the spores they usually assume a pinkish or flesh-colored hue. 

 Wounds of the tubes in some species cause a change in color but not to 

 blue, nor are the tube mouths differently colored as in the Luridi. The 

 stem in some is more or less reticulated but this is scarcely a constant 

 or reliable character in these species. Typically the spores are rosy or 

 flesh-colored, but I have admitted species in which they incline to rust- 

 colored, giving more weight to the color of the tubes than to that of 

 the spores. 



Pileus black or blackish .B. nigrellus 



Pileus some other color , .... ......... i 



I . Stem more than four lines thick , 2 



I. Stem slender, generally less than four lines thick , .B. gracilis 



2 . Stem not reticulated 3 



2 . Stem more or less reticulated. . . . . , 4 



3 . Tubes angular, flesh-colored B. conicus 



3. Tubes round, white .B. alutarius 



4. Taste mild B. indecisus 



4. Taste bitter B. felleus 



Peck, Boleti of the U. S. 



B. COIUCUS Rav. conical. Pileus convex or sttbconical, clothed 

 with bundled appressed yellowish flocci. Flesh white, unchangeable, 



466 



