NATURAL HISTORY SURVEY 115 



The context is of a yellow-ferruginous color not approached by 

 any other species in our district, with the exception of Fames 

 Ribis. 



This is the type of the genus Mucronoporus Ellis, including 

 forms of Polyporei in which the tubes are furnished with pro- 

 jecting spinules. In the present species they are said to project 

 15 to 20 ft., and to be 4 to 5 p. thick at the base. 



Polyporus fumosus Pers. 



Pileus fleshy-corky, azonate, sericeous, becoming glabrate, 

 sooty-pallid, dilate-adnate behind, within fibrous, subzonate. 



Pores small, short, round, entire, whitish-smoky, becoming 

 darker if rubbed. Context white or pallid. 



On stumps, dead trunks, etc., of various trees. In form and 

 habit often resembling forms of P. adustus, but the pileus is corky, 

 thicker and paler than in that species. The imbricated pilei often 

 extend along the split surface of a standing trunk or fallen branch 

 a distance of several metres. 



Polyporus adustus Willd. 



Pileus fleshy-tough, thin, villous, cinereous-pallid, effuso- 

 reflexed behind 



Pores minute, short, round, obtuse, whitish becoming blackish 

 in drying; context white. 



On dead logs and stumps; very common. Often wholly 

 resupinate, in patches many cm. in diameter, or else widely 

 and irregularly effused, here and there forming confluent pilei. 

 The margin of the young pileus is whitish, obtuse, and sterile. 

 The pore-surface is fuliginous or slate-color. In May, 1899, this 

 plant appeared upon a de-ad stump in a lawn at Wheaton. By 

 July, more than half the surface of the stump was covered by the 

 fungus, which included at its base such twigs and grasses as 

 chanced in its path, and even extended o it upon and into the 

 adjacent soil a distance of 5 to. 7 cm. 



The genus Myriadoporus is said to be founded upon an im- 

 perfect form of this species. This form has been found on rotting 

 logs at Riverside. 



Polyporus galactinus Berk. 



White; pileus simple or subimbricate, spongy-fleshy, soft, 

 becoming hardened, strigose-tomentose, zonate within, the margin 

 incurved. 



Pores minute, round, entire. Pileus 5 to 10 cm. in width, 

 somewhat pulvinate. 



On the ground attached to the roots of trees or decaying 

 stumps. July to October. 



The surface of the pileus is irregularly rugose or roughened 

 with warts and tubercles, but is not strigose-tomentose in our 

 specimens. The color of the fresh plant is often a dirty, smoky 

 or bluish-white. The pore-surface is convex, white or creamy- 



