1925] 



BURT — THE THELEPHORACEAE OF NORTH AMERICA. XIV 279 



Fructifications effused, somewhat membranaceous, tender, 

 hymenium drying warm buff usually but sometimes whitish to 

 cartridge-buff, sometimes cracked and showing the cottony sub- 

 stance, the margin byssoid or fibrillose and sometimes connected 

 with antimony-yellow mycelial strands; in section 200-300 [t. 

 thick, not colored, with the hyphae loosely arranged, hyaline, 

 rarely nodose-septate, with some incrusting granules in the sub- 

 hymenium; cystidia hair-like, not incrusted, tapering, 3-4 [x in 

 diameter, protruding up to 25 [i, not numerous; spores hyaline, 

 even, 4-4i^ X 2-23^ [x. 



Fructifications 2-7 cm. long, 1-2 cm. broad. 



On wood and fallen limbs of frondose species in woods. Ver- 

 mont to Louisiana and in Ohio, Michigan, and Montana. July 

 to October. Rare. 



This species is noteworthy by the antimony-yellow or ochra- 

 ceous mycelial strands or cords which grow from under the bark 

 and connect with the fructifications. The presence of cystidia 

 separates this species from Corticium sulphureum which has 

 yellower fructifications and not as large mycelial cords when 

 present. 



Specimens examined: 

 Exsiccati: EUis, N. Am. Fungi, 933, under the name Corticium 



radiosum. 

 Vermont: Middlebury, E. A. Burt. 

 Massachusetts: Sharon, A. P. D. Piguet, 136, comm. by Farlow 



Herb, (in Mo. Bot. Gard. Herb., 59627). 

 New York: Ithaca, H. H. Whetzel, comm. by Cornell Univ. 



Herb., 13760. 

 New Jersey: Newfield, J. B. Ellis, in ElUs, N. Am. Fungi, 933. 

 Virginia: Crabbottom, W. A. Murrill, 239 (in N. Y. Bot. Gard. 



Herb., Burt Herb., and Mo. Bot. Gard. Herb., 61560). 

 Alabama: Auburn, Alabama Biological Survey. 

 Louisiana: Bogalusa, C. J. Humphrey, 6472; St. Martinville, 



A. B. Langlois, cl. 

 West Virginia: Paw Paw, C. L. Shear, 1179. 

 Ohio: C. G. Lloyd, 3823, type. 

 Michigan: New Richmond, C. H. Kaufman, 34 (in Mo. Bot. 



Gard. Herb., 23060). 



