1920] 
BURT—THELEPHORACEAE OF NORTH AMERICA. XII 201 
Wholly resupinate specimens 3-2 cm. in diameter, becoming 
laterally confluent over areas up to 15X2 cm.; reflexed portions 
1-5 mm. broad—up to 2 em. broad in European specimens. 
On dead Tsuga, Pseudotsuga, Abies, Picea, Larix, Thuja, 
and Cupressus. Canada to New Jersey, in Wisconsin, in Idaho 
to British Columbia and Washington, and in New Mexico at 
altitude 7500 ft. Occurs also in Europe. Probably throughout 
the year but most collections dated July to October. Infrequent. 
S. Chailletii occurs just often enough reflexed so that an 
observant collector will soon locate his gatherings correctly in 
Stereum. It is noteworthy by its colored cystidia of the same 
type as those of S. umbrinum but of only half the diameter 
of those of the latter, and by its occurrence on conifers of the 
species named above, and by restriction in geographic range to 
the northern United States and southern Canada and the Rocky 
Mountain plateau. The avellaneous, somewhat velvety hymen- 
ium is so uniform in appearance that when once learned this 
species may usually be recognized thereafter at sight. 
Specimens examined: 
Exsiecati: Ell. & Ev., N. Am. Fungi, 2904, under the name Hy- 
menochaete simulans Ell. & Ev., n. sp., but description does 
not seem to have been published; Krieger, Fungi Sax., 1202. 
Norway: Christiania, M. N. Blytt, determined by E. Fries (in 
Herb. Fries). 
Finland: Merimason, P. A. Karsten, authentie specimen of T'ri- 
chocarpus ambiguus. 
Sweden: Stockholm, L. Romell, 24, 25, 341, all under the name 
Stereum abietinum. 
France: Arnac, Aveyron, A. Galzin, unnumbered spec. and 17948, 
comm. by H. Bourdot, 7926, and unnumbered respectively. 
Switzerland: Sachs, W. Krieger, in Krieger, Fungi Sax., 1202. 
Italy? or perhaps Hungary?: locality not given, G. Bresadola. 
Canada: Cow's Swamp, J. Macoun, 115; Dow's Swamp, J. 
Macoun, 249 in part. 
Ontario: Ottawa, J. Macoun, 57. 
Vermont: Ripton, E. A. Burt, two collections. 
New York: Beaver River, Adirondack Mts., G. F. Atkinson, 
Bot. Dept. of Cornell Univ., 4607; Ithaca, G. F. Atkinson, 
14189; Syracuse, G. F. Atkinson, 677, part of type of 
Peniophora Atkinsonit. 
