[Vol. 5 



346 



ANNALS OF THE MISSOURI BOTANICAL GARDEN 



(Pers.) Fries, Epicr. 561. 1838; Hym. Eur. 650. 1874. 

 Hymenochaetella rudis Karsten, Hedwigia 35 : 173. 1896. 

 Hymenochaete rudis Karsten in Sacc. Syll. Fung. 14 : 218. 

 1899. 

 Type : specimen determined by Fries in Herb. Fries. 

 Fructification resupinate, widely effused, adnate, velvety, 

 not cracked, drying antique brown to Brussels-brown, the 



margin tomentose-fibrillose ; in structure 

 becoming 500-1000 n thick, stratose, rang- 

 ing up to 6 strata, each composed of a 

 setigerous layer 30-45 /n broad and of a 

 hyphal layer of equal or greater breadth, 

 with hyphae colored like the fructifica- 

 tion, loosely interwoven, 3 /x in diameter; 

 setae 60-90x5-6 /x, protruding up to 60 /x, 

 tapering upward from the base, originat- 

 ing in all parts of the setigerous layers; 

 spores hyaline, even, 4^-6x2-2^ n as seen 

 in sectional preparations, stated by Bres- 

 adola to be 6-9x2 J y. as obtained from 

 spore collections. 

 Fructifications 3-7x1^-24 cm. 



On bark and decaying wood of both f rondose and coniferous 

 species but usually on the former. New York to California 

 and British Columbia. June to April. Rare. 



H, cinnamomea closely resembles in color and general as- 

 pect Hypochnus ferrugineus but is thicker and with a more 

 compact hymenium. I base my idea of H. cinnamow,ea on the 

 specimen from Norway determined by Fries and the fine speci- 

 mens of identical structure collected in Lapland by Romell, 

 in Finland by Karsten, and in Ardennes by Libert. The 

 specimen from Hungary, received from Bresadola, has the 

 same aspect, velvety, not cracked, and a thin surface setiger- 

 ous layer but varies toward H. spreta by having its deeper 

 setigerous layers more than 45 /x broad and exceeding the 

 adjoining hyphal layers. This specimen from Bresadola 

 formerly led me to regard H. spreta as a synonym of H. cin- 

 namomea and to refer to H. cinnamomea for my correspond- 



Fig. 17 



H. cinnamomea. 



Section X 44. From 

 specimen in Herb. 

 Fries. 



