SPORES HYALINE. SETAE NONE. 



brown ^Mummy brown). Pores very minute, with concolorous 

 tissue and mouths. Setae, none. Spores not found, doubtless white. 

 Known only from the type at Kew, from Brazil. The annual 

 ridges of the pileus suggesting steps, whence the name. I have a 

 collection from Java which has been referred here, but to me it is 

 quite doubtful. 



FOMES BACCHARIDIS. Pileus small, applanate. Context 

 dark brown. Setae, none. Spores abundant, hyaline, globose, 7-8 

 mic. 



This is known to me only from some type material from Patouill- 

 ard. It is a small species, comparable to Femes conchatus, excepting 

 in having no setae. It comes from tropical America. 



FOMES TENUISSIMUS. Pileus very thin, 3-4 mm. thick, 

 with rugulose, zoned surface. Context dark brown. Pores minute. 

 Setae (?) reported scanty by author, not found by me. Spores glo- 

 bose, hyaline, 3^2 mic. 



This is scantily known from Philippine collection. If it is a 

 Fomes, as it appears to be from its woody context, it is surely the 

 "thinnest" Fomes known. 



NOTE. Setaeless specimens of Fomes igniarius would be sought in this section. 



Fig. 586. Fig. 587. 



Fomes angularis. Fomes atro-umbrinus. 



C. Small Species, 1-3 Cm. 



FOMES ANGULARIS (Fig. 586). Pileus angular, semiresup- 

 inate, small (2-3 cm. wide, 1-1 }4 cm. thick). Surface black, hard, 

 with narrow, raised zones. Context dark brown (Prout's brown). 

 Pores minute, with narrow layers 1 mm., tissue and pore mouths 

 concolorous. Setae, none. Spores (?) hyaline, globose, 3^-4 mic. 

 Numerous crystals are found in making a section. 



