1918] 
BURT—THELEPHORACEAE OF NORTH AMERICA. X 333 
composed of longitudinally arranged, colored hyphae 23 p in 
diameter and bordered above by a narrow, dense, dark zone; 
setae very numerous, slightly eurved, tapering upward to a 
very sharp point, 50-60X 5-6 и, emerging up to 45 y, starting 
from all parts of the setigerous layer; spores hyaline, even, 
4-6 2-3 p. 
Fructifications with reflexed portion 1-21 em. long, 1-3 cm. 
broad and sometimes larger by lateral confluence; resupinate 
portion 7-8X 1-3 em. 
On decaying logs and stumps of oak and other frondose 
species. Canada to Mexico, westward to Oregon and Cali- 
fornia, and in Porto Rico. July to February, persisting to 
June. Common. 
H. rubiginosa may be recognized by its rigid pileus, velvety, 
concentrically suleate, and Brussels-brown (rubiginous) in 
color, by the colliculose, bister hymenium whose dark red com- 
ponent color and setae show to advantage in reflected light, 
and by the brighter ochraceous margin. Even resupinate 
specimens may be recognized at sight by being separable from 
the substratum, and by the form and color of the hymenium 
and the contrasting bright margin. The structure in section 
is equally constant and distinctive. This species produces a 
pocketed heart rot in oak wood. 
Specimens examined: 
Exsiecati: Bartholomew, Fungi Col, 3133; Berkeley, Brit. 
Fungi, 247; Ellis, N. Am. Fungi, 327; Kunze, Fungi Sel., 
203; Rabenhorst, Herb. Мус., 212. 
England: in Berkeley, Brit. Fungi, 247; Kenilworth, W. A. 
Murrill (in N. Y. Bot. Gard. Herb., and in Mo. Bot. Gard. 
Herb., 55542). 
Sweden: Upsala, E. Fries, det. by Fries as Stereum ferru- 
gineum, comm. by L. Romell, 27; Femsjo, L. Romell, 35; 
Halland, L. Romell, 36; Lapland, L. Romell, 396, 397. 
Germany: J. Kunze, in Kunze, Fungi Sel., 203 (in Mo. Bot. 
Gard. Herb., 44098); from Persoon, under the name Тһе- 
lephora rubiginosa (in Kew Herb.); Dresden, in Raben- 
horst, Herb. Мус., 212. 
