SECTION LIGNOSUS. 



Fig 421 

 Lignosus superpositus. 



PREUSSII. Pileus with a dark, nearly black, rugulose surface. 

 Stipe mesopodal. Context and pores pale isabelline, rigid. Pores 

 minute. Spores not found, but I think are white. Known from one 

 specimen at Berlin from Africa. The photograph would closely re- 

 semble Polyporus rugosus, but the plant is quite different. It is close 

 to the preceding if not the same. It was named by Hennings as Gano- 

 dermus, but does not belong to that section though it might be called a 

 Trametes. 



DEALBATUS (Fig. 422). Pileus lateral or unilateral with a 

 stem 3-8 mm. thick. Surface pale, smooth, dull with a minutely 

 velutinate coat (compared in its naming to a coat of whitewash). Con- 

 text pale. Spores globose or compressed-globose, 5-6, smooth. This 



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