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 m thick, composed of longitudinally 

 and densely arranged, hyaline hyphae 3-3| m in diameter, with 

 the intermediate layer not bordered on the upper side by a 

 denser, darker zone; hair-like cystidia hyaline, cylindric, flex- 

 uous, 50-60X5-6 m, emerging up to 40 m, but rarely present; 

 basidia simple, with 4 sterigmata, often protruded; spores 

 hyaline, even, 9-10X3-4 m, somewhat curved. 



Fructifications 3X2 mm., up to 25X3 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, 713, type, 762, 753, 884, 



917. 

 California: Campo Mts., C. D. Orcutt, 2005, comm. by U. S. 



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. 

 Kept. 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.S. 4:167. 1832. 



