1926] 



BURT THELEPHORACEAE OF NORTH AMERICA. XV 233 



Fructifications 5-10 cm. long, 1-5 cm. wide. 



On decorticated wood of dead Vitis and on decaying bark of 

 Quercus Gambelii and Tilia. Florida, Illinois, Colorado, and 

 Manitoba. July to October. 



C. rubellum differs from C. rubicundum in becoming finally 

 stratose and somewhat colored, having larger and more subglobose 

 spores, and occurring on dead grape vines, oak, and bass wood. 

 The Florida specimen lacks spores and may be incorrectly re- 

 ferred here. C. confluens has similar spores. 



Specimens examined: 

 Florida: New Smyrna, W. A. Murrill, 27, comm. by N. Y. Bot. 



Gard. Herb, (in Mo. Bot. Gard. Herb., 62081). 

 Illinois: Glencoe, E. T. & S. A. Harper, 941, type; River Forest, 



E. T. & S. A. Harper, 661. 

 Colorado: Deer Creek Park, E. Bartholomew, 9149, 9150. 

 Manitoba: Winnipeg, A. H. R. Butler, comm. by G. R. Bisby, 



724 (in Mo. Bot. Gard. Herb., 58987). 



43. C. hydnans (Schw.) Burt, n. comb. 



Radulum hydnans Schweinitz, Am. Phil. Soc. Trans. N. S. 4: 

 164. 1832; Sacc. Syll. Fung. 11: 112. 1895. Corticium collicu- 

 losum Berk. & Curtis, Grevillea 2: 3. 1873; Peck, N. Y. State 

 Mus. Rept. 28: 52. 1876; Sacc. Syll. Fung. 6: 618. 1888; 

 Massee, Linn. Soc. Bot. Jour. 27: 134. 1890. 



Type: in Farlow Herb, and probably in Schweinitz Herb. 



Fructifications long and widely effused, adnate, thin, mem- 

 branaceous, small pieces separable when moistened, pinkish buff 

 to cinnamon-buff in the herbarium, becoming more or less col- 

 liculose or somewhat tuberculate, cracking into polygonal masses 

 1-2 mm. in diameter, the margin whitish, with hyphae inter- 

 woven; in structure 100-300 y. thick, not colored, with the hyphae 

 longitudinally arranged next the substratum and then ascending 

 and interwoven to the hymenium, 2-3 y. in diameter, not in- 

 crusted; no gloeocystidia; spores hyaline, even, 5-8 X 2)^-3}^ ji. 



Fructifications 1-10 cm. long, 1-3 cm. wide. 



On decaying frondose limbs on the ground. Canada to Texas 

 and westward to Washington and British Columbia. April to 

 November. Occasional. 



