9O TROPICAL POLYPORES 



finely tomentose, castaneous-umbrinous, becoming bay when 

 bruised; context hard, fibrous, zonate, lustrous, dark-reddish- 

 violet to chestnut-colored, 5 mm. thick, much thinner in old 

 specimens; tubes distinctly stratified, 3-4 mm. long each season, 

 blackish to black the first year, avellaneous in the older layers, 

 mouths circular, minute, 5-6 to a mm., edges thick, entire, 

 umbrinous, becoming angular, thin, and dark-smoky-black with 

 age; spores ovoid, smooth, hyaline. 



Occasional throughout on dead or diseased trunks of trees. 



43. ELFVINGIELLA Murrill 



Hymenophore large, epixylous, sessile, applanate or ungulate; 

 surface sulcate, horny-encrusted; context brown, punky; tubes 

 brown, cylindric, stratose, thick- walled ; spores smooth, hyaline 

 or subhyaline. 



i. ELFVINGIELLA FASCIATA (Sw.) Murrill, comb. nov. 



Pileus hard, dimidiate, applanate to ungulate, convex above, 

 7-10 X 8-15 X 2-6 cm.; surface finely tomentose, at length 

 glabrous, concentrically sulcate, at first mole-colored, changing 

 to umbrinous, and finally avellaneous with black fasciations; 

 margin acute to obtuse, isabelline, sterile, undulate or entire; 

 context punky, thin, ferruginous to fulvous, zonate, 3-5 mm. 

 thick; tubes indistinctly stratified, 5-10 mm. long each season, 

 avellaneous within, mouths circular, minute, 4-5 to a mm., 

 edges obtuse, avellaneous to umbrinous, becoming darker when 

 bruised; spores subglobose, smooth, light-brown, 5-7 /x. 



Common throughout on dead trunks of various trees. The 

 validity of the specific name used is doubtful. 



44. ELFVINGIA P. Karst. 



Hymenophore large, epixylous, sessile, applanate or ungulate; 

 surface sulcate, horny-encrusted; context brown, punky; tubes 

 brown, cylindric, stratose, thick- walled, mouths whitish or 

 yellowish when young; spores brown; conidia present in most 

 species on or near the surface of the pileus. 



Pileus thick at maturity, crust smooth and very hard; hymenium 



plane; margin truncate, very smooth, often laccate. I. E. tornata. 



Pileus thin, crust radially wrinkled, thinner; hymenium concave; 



margin undulate, never laccate. 2. E. Lionnetii* 



