[Vol. 5 

 366 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



Eur. 645. 1874. — Hymenochaetella fusca Karsten, Hedwigia 

 35 : 174. 1896. — Hymenochaete fusca Karsten in Sacc. Syll. 

 Fung. 14 : 218. 1900. 



Fructifications resupinate, broadly effused, adnate, thin, not 

 cracked, somewhat colliculose, bister to warm sepia, con- 

 spicuously setulose under a lens, the margin determinate ; in 



structure with setigerous layer 150- 

 200 II thick, sessile upon the sub- 

 stratum; setae abundant, 60-75x8-9 

 II, emerging up to 45 ix, starting from 

 Fig. 32 all parts of the setigerous layer; 



H. fuiiginosa. spores of spore collection white, even, 



Section X 68. From Bres- J. \/ 9 

 adola. See pi. IT, f. 10. ^'^^ f^' 



Covering areas up to 15x5 cm. 



On decorticated, rotting wood of frondose species. Ver- 

 mont, Maryland, Ohio, Kentucky, and in Cuba. June to 

 October. Local. 



H. fuiiginosa has the aspect of a resupinate H. ruhiginosa, 

 but is not separable and lacks the conspicuous ochraceous- 

 tawny margin of the latter; when sections are viewed with 

 the microscope they show a setigerous layer like that of H. 

 ruhiginosa but differing by having this setigerous layer 

 seated directly upon the substratum instead of upon an in- 

 termediate layer. The structure in section places H. fuiig- 

 inosa in the group of species with H. corrugata; it is distin- 

 guished from the latter by not cracking, by colliculose surface, 

 and by color. American specimens agree well with that re- 

 ceived from Bresadola, whom I have followed as to name for 

 the present. 



Specimens examined: 

 Sweden: authentic specimen from Karsten of Hymenochaete 



fusca, comm. by J. Bresadola. 

 Austria-Hungary: Hungary, Kmet, det. and comm. by J. 



Bresadola. 

 Vermont: Middlebury, E. A. Burt, three collections, and C. G. 



Lloyd, 10693 (in Lloyd Herb., and in Mo. Bot. Gard. Herb., 



55555). 

 Maryland: Takoma Park, C. L. Shear, 1157. 



