1916] 



BURT THELEPHORACEAE OF NORTH AMERICA VI 239 



Fructification widely effused, thin, with surface a reticu- 

 late, felty web, perforate, not separable, between olive-buff 

 and deep olive-buff; in structure 100-150/a 

 thick, with hyphae thick-walled, nodose-septate, ,.- .,? >i. Mq. T r r7r^ 

 giving their color to the fructification but ^^-'||-*^^^-^'^-^ 

 nearly hyaline under the microscope, 3-3%/Lt in )j /\^ 



diameter, minutely rough-walled near the sub- / 



stratum and sending out loosely interwoven jj fibniiosus 

 branches which bear clusters of basidia ; ba- Spores, hypha 

 sidia 18 X 5/*, bearing 4 spores on short sterig- 

 mata; spores concolorous with the hyphae, angular, the 

 body 3-3% /* in diameter. 



The specimen, 6 cm. in diameter, is a portion of a large 

 specimen and does not show the natural margin. 



On very rotten coniferous wood. Canada. September. 



This species has the general habit and color of Corticium 

 vagum and is well characterized by its general habit, pale 

 color, and small angular spores. 



Specimens examined: 

 Canada: locality not stated, J. Macoun, 25, Sept. 29, 1892. 



O 30. H. fumosus Fries, Obs. Myc. 2:279. 1818 and 1824. 

 Corticium fumosum Fries, Epicr. 562. 1838 ; Hym. Eur. 651. 

 1874; Sacc. Syll. Fung. 6:613. 1888. Phlehia vaga Fries, 

 Syst. Myc. 1 :428. 1821 ; Elenchus Fung. 1 :155. 1828; Epicr. 

 527. 1838; Hym. Eur. 625. 1874; Sacc. Syll. Fung. 6:498. 

 1888; Bresadola, I. E. Accad. Agiati Atti III. 3:105. 1897. 

 Corticium sulphureum Pers. Obs. Myc. 1:38. 1796, but not 

 Corticium sulphureum Fries. Odontia fusca Cooke & Ellis, 

 Grevillea 9:103. 1881; Sacc. Syll. Fung. 6:509. 1888. 



Fructification effused, membranaceous, separa- 

 ble, with the outer surface more or less overrun 

 ^ with intricate, branching, anastomosing threads. 



Fig. 30 i^^Ti granular, honey-yellow to drab and fuscous, 

 H. fumosus. the margin whitish or yellowish, flaxy-fibrillose, 

 ^^^ ' radiating; in structure about 200)u, rarely up to 

 500/t>i, thick, with hyphae longitudinally interwoven, occasion- 

 ally nodose-septate, 2%-3i/2/>t in diameter, thin-walled, hya- 

 line, or slightly smoky if the fructification is dark colored ; no 



