1917] 
BURT—THELEPHORACEAE OF NORTH AMERICA. VIII 255 
guished from both species by having inerusted hyphae which 
are coarser than those of C. arida. The European C. Betulae 
Karst., of which I have an authentie specimen, does not form 
a compact hymenial membrane, is very thin, not at all sep- 
arable from substratum, has the margin similar to the central 
portion of the fructification, hyphae frequently nodose-sep- 
tate, and cystidia always present, 6 y in diameter, emerging 
20-30 u above the basidia—differing in all the above respects 
from our C. suffocata. C. subcinnamomea Karst. differs by 
having in its hymenium noteworthy branching paraphyses 
and small, flexuous cystidia. C. suffocata is probably very de- 
structive as a timber rot. The cystidia when occasionally dis- 
tinguishable are about 6 и in diameter and emerge up to 20 
or even 40 y above the basidia. 
Specimens examined: 
Exsiecati: Ellis, N. Am. Fungi, 328, under the name Нутепо- 
chaete Ellisu; Ell. & Ev., Fungi Col., 219, under the name 
Coniophora puteana. 
Canada: Lower St. Lawrence Valley, J. Macoun, 7, 48, 55. 
Ontario: Ottawa, J. Macoun, 416; Toronto, G. Н. Graham, 
Univ. Toronto Herb., 681 (in Mo. Bot. Gard. Herb., 44939). 
Vermont: Middlebury, Е. A. Burt. 
Massachusetts: Belmont Spring, C. Bullard, comm. by W. G. 
Farlow, 3, and an unnumbered specimen; Hammond’s Pond, 
Brookline, G. R. Lyman, 176. 
New York: Alcove, C. L. Shear, 1303; East Galway, E. A. 
Burt; Ithaca, С. Е. Atkinson, 997; Karner, Н. D. House, 
N. Y. State Mus. Herb., 14.165 (in Mo. Bot. Gard. Herb., 
44714); Sandlake, C. H. Peck, type (in Coll. N. Y. State). 
New Jersey: Newfield, J. B. Ellis, in Ellis, N. Am. Fungi, 328, 
and in Ell. & Ev., Fungi Col., 219, and on white oak, Feb. 3, 
1877 (in Farlow Herb.). 
Pennsylvania: State College, C. R. Orton, comm. by L. O. 
Overholts, 2897 (in Mo. Bot. Gard. Herb., 5719). 
District of Columbia: Rock Creek, С. L. Shear, 1350. 
Florida: W. W. Calkins (in U. S. Dept. Agr. Herb., under the 
name Corticium epichlorum). 
Louisiana: St. Martinville, А. B. Langlois, cg. 
