1926] 



BURT — THELEPHORACEAE OF NORTH AMERICA. XV 219 



lose, sometimes radiate; in section 200-800 [l thick, not colored, 

 with hyphae somewhat longitudinally interwoven and then as- 

 cending to a compact hymenium, 2-3 [i in diameter, rarely larger, 

 not incrusted but mixed with more or less mineral matter; no 

 gloeocystidia; spores hyaline, even, flattened on one side, 8-12 

 X 5-8 [X. 



Fructifications 2-10 cm. long, 13^-3 cm. wide, often confluent. 



On bark of decaying Quercus and other frondose species. 

 Throughout Canada and the United States. April to December. 

 Frequent. 



C. cremoricolor is so similar to C. hydnans in aspect that the 

 much larger spores of C. cremoricolor afford the best character for 

 separation of these two species. C. cremoricolor is less tubercular, 

 however, thicker, and usually with cracks radiating from the 

 center of the fructification. C. anthracophilum Bourd. is closely 

 related in structure. 



Specimens examined: 

 Canada: J. Macoun, 19. 

 Massachusetts: Cambridge, L. M. Underwood, 1001 (in N. Y. 



Bot. Card. Herb., and Mo. Bot. Card. Herb., 57340). 

 New York: Ithaca, H. S. Jackson, comm. by Cornell Univ. Herb., 



14391; Onondaga Valley, L. M. Underwood (in N. Y. Bot. 



Card. Herb., and Mo. Bot. Card. Herb., 61388). 

 New Jersey: Belleplain, C. L. Shear, 12Ji7 , Newfield, /. B. Ellis, 



comm. by Farlow Herb, (in Mo. Bot. Gard. Herb., 44636). 

 Pennsylvania: Ohio Pyle, W. A. Murrill, 1076, 1133 (in N. Y. 



Bot. Gard. Herb., and Mo. Bot. Gard. Herb., 61586, 61579); 



Reitz Gap, L. 0. Overholts, 4633 (in Mo. Bot. Gard. Herb., 



56118); State College, L. 0. Overholts & C. R. Orton, comm. by 



L. O. Overholts, 4723 (in Mo. Bot. Gard. Herb., 56115); 



Trexlertown, W. Herbst, comm. by Lloyd Herb., 2227; White- 

 haven, G. F. Atkinson, 865 4. 

 Maryland: Takoma Park, C. L. Shear, 1075. 

 District of Columbia: Washington, C. L. Shear, 12^0, 1259. 

 Florida: W. W. Calkins, comm. by Farlow Herb, (in Mo. Bot. 



Gard. Herb., 44633). 

 Alabama: Peters, type (in Kew Herb., and Curtis Herb., 5205). 

 Texas: Houston, H. W. Ravenel, 271, comm. by U. S. Dept. Agr. 



