1917] 
BURT—THELEPHORACEAE OF NORTH AMERICA. VIII 241 
dome-shaped tubercules; in structure 300-1000 д thick, com- 
posed of densely interwoven, hyaline, even-walled hyphae 4-7 
шіп diameter; no cystidia; basidia with 4 sterigmata; spores 
giving their color to Ше hymenium, even, 10-14 6-7 y. 
Fructifications usually about 4-6 em. in 
diameter or elongated up to 15 em. long, 
5 em. broad, sometimes larger, 1-1 mm. 
thick. | 
Оп logs and wood of both coniferous 
and frondose species, but more common 
on coniferous kinds. Quebec to District 
of Columbia and westward to British 
Columbia and California. Apparently | 
rare in tropical America. July to A E 
February. Section of fructifica- 
Well-developed specimens of C. cere- rr s 45; spores 
bella aré fleshy and thick and frequently 
have the hymenial surface protrude in broad, dome-shaped 
tubereules; young and thin fructifications are likely to be 
confused with C. arida, which has the same color but in вес- 
tion has its hyphae much less compactly interwoven and not 
as coarse as in C. cerebella. 
Specimens examined: 
Exsiecati: Cavara, Fungi Longobardiae, 14; Ell. & Ev., N. 
Am. Fungi, 1588 (in eopy of Mo. Bot. Gard. Herb. but not 
in copies of Farlow Herb. and of U. S. Dept. Agr. Herb.) ; 
Karsten, Fungi Fenn., 135; Krieger, Fungi Sax., 1201. 
Sweden: Femsjo, E. Fries (in Herb. Fries, determined by 
Fries). 
Finland: P. A. Karsten, in Karsten, Fungi Fenn., 135. 
Austria-Hungary: definite locality not given, Strasser, comm. 
by J. Bresadola. 
Germany: Saxony, W. Krieger, in Krieger, Fungi Sax., 1201. 
Italy: Pavia, F. Cavara, in Cavara, Fungi Longobardiae, 14. 
Canada: definite locality not given, J. Macoun, 11, 23, 44, 58, 
79; Lower St. Lawrence Valley, J. Macoun, 13. 
Quebec: Hull, J. Macoun, 377; Montreal, H. von Schrenk (in 
Mo. Bot. Gard. Herb., 44053). 
