15 



Hymeniuni white or pallid. 



Context fleshy to fleshy-tough, friable when 



dry. G. Tyromyces 



Context punky to corky, not friable when dry. 

 H. Trametes 

 Surface pelliculose, zonate. I. Rigidoporus 



Pileus thin, leathery and more or less flexible, surface usually 

 zonate. 

 Hymenophore preceded by a cup-shaped body. 



J. PORONIDULUS 



Hymenophore not as above. 



Hymenophore normally pileate, tubes small and 



regular. K. CoRiOLUS 



Hymenophore semi-resupinate, tubes large and 

 irregular. L. Coriolellus 



Context bright-colored ; some shade uf yellow or red. 

 Pores red. 



Context soft and spongy. , M. Aurantiporellus 



Context firm. 



Tubes unchanged on drying. 



Tubes fragile, surface anoderm. N. Pycnoporellus 



Tubes firm and regular, surface pelliculose. 



0. Pycnoporus 

 Tubes orange-colored, becoming dark and resinous on drying. 



P. AURANTIPORUS 

 Pores yellow. Q. Laetiporus 



A. The Sessile Species of Hexagona 



1. Tubes unequally hexagonal, the radial walls longer. 2 

 Tubes equally hexagonal. H. iucullata (Mont.) Murrill 



2. Tubes large ; surface of pileus decorated with imbricated reddish-brown fibrils, 



which disappear with age. H. alveolaris (DC.) Murrill 



Tubes much smaller, the mouths rarely over i rem. long and 0. 5 mm. broad ; 



surface of pileus glabrous. H. striatula ( E. & E. ) Murrill 



B. The Species of Irpiciporus 



I. Teeth I cm. or more long, pileus usually large and thick. 



/. mollis (B. & C.) Murrill 

 Teeth less than 0.5 cm. long ; pileus thin and shortly reflexed. 



/. lacteus (Fr.) Murrill 



C. The Species of Piptoporus 



Pileus compressed-ungulate, surface smooth, context thick, milk-white. 



P. suberosus (L. ) Murrill 



D. The Species of Spongiporus 



Pileus 6-10 cm. broad, surface tomentose to glabrous, tubes large, lacerate. 



S. leucospongia (Cooke «S: Hark.) Murrill 



