[Vor. 5 
346 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
(Pers.) Fries, Epier. 561. 1838; Hym. Eur. 650. 1874.— 
Hymenochaetella rudis Karsten, Hedwigia 35:173. 1896.— 
Hymenochaete rudis Karsten іп Sace. Syll. Fung. 14: 218. 
1899. 
Type: specimen determined by Pios i 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 р thick, stratose, rang- 
КК ing up to 6 strata, each composed of а 
T. bau i setigerous layer 30-45 u broad and of a 
hyphal layer of equal or greater breadth, 
7 with hyphae colored like the fructifica- 
tion, loosely interwoven, 3 шіп diameter; 
bs li Jod RAM setae 60-90X 5-6 и, protruding up to 60 y, 
YON) 0? vw" tapering upward from the base, originat- 
Fig. 17 ing in all parts of the setigerous layers; 
H. cinnamomea. spores hyaline, even, 43-6 2-21 u as seen 
Section X 44. From in sectional preparations, stated by Bres- 
ree теп in Heb adola to be 6-9x23 и as obtained from 
spore collections. 
Fructifications 3-7 x 141-21 em. 
On bark and decaying wood of both frondose and coniferous 
species but usually on the former. New York to California 
and British Columbia. June to April. Rare. 
Н. 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. cinnamomea 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 д 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- 
