1920] 
BURT—THELEPHORACEAE OF NORTH AMERICA. XII 183 
Fructification coriaceous-fleshy, resupinate, the margin be- 
coming free or narrowly reflexed, hoary with a few short hairs, 
drying cinnamon to bone-brown, the margin entire; hymenium 
even, waxy, cracking in drying, drying cinnamon to bone- 
brown; in structure 500-800 u thick, composed of longitudinally 
and densely arranged, hyaline hyphae 3-34 u in diameter, with 
the intermediate layer not bordered on the upper side by a 
denser, darker zone; hair-like cystidia hyaline, cylindrie, flex- 
uous, 50-60X5-6 u, emerging up to 40 u, but rarely present; 
basidia simple, with 4 sterigmata, often protruded; spores 
hyaline, even, 9-10 X 3-4 u, somewhat curved. 
Fructifications 3X2 mm., up to 25 X3 mm., the margin free 
all around and rolled up 1-2 mm. 
On fallen branches of Acer, Quercus, and other frondose species. 
Washington, California, and New Mexico. August to April. 
Rare. 
S. patelliforme differs from our other Stereums by being of 
more fleshy consistency and with a waxy hymenium. In these 
characters it approaches Corticium, but it has the longitudinal 
arrangement of hyphae characteristic of Stereum and the margin 
becomes narrowly reflexed. "These characters separate S. patelli- 
forme from our other Stereums with the exception of S. pubescens, 
which is snow-white on the upper side with a thick covering 
of fine soft hairs, is more broadly reflexed, and has a somewhat 
radiately rugose hymenium. 
Specimens examined: 
Washington: Bingen, W. N. Suksdorf, 718, type, 752, 753, 884, 
I 
California: Campo Mts., C. D. Orcutt, 2005, comm. by U. $. 
Dept. Agr. Herb. 
New Mexico: Ute Park, Colfax Co., P. C. Standley, 14735, 
comm. by N. Y. Bot. Gard. Herb. (in Mo. Bot. Gard. Herb., 
44951). 
55. S. ochraceo-flavum Schweinitz in Peck, N. Y. State Mus. 
Rept. 22:86. 1869; Morgan, Cincinnati Soc. Nat. Hist. Jour. 
10:195. 1888; Sacc. Syll. Fung. 6:576. 1888; Massee, Linn. 
Soc. Bot. Jour. 27: 184. 1890. Plate 5, fig. 55. 
Thelephora ochraceo-flava Schweinitz, Am. Phil. Soc. Trans. 
N. 8. 4: 167. 1832. 
