1926] 



BURT THELEPHORACEAE OF NORTH AMERICA. XV 271 



Mississippi: Hattiesburg, C. J. Humphrey, 5454. 



Louisiana: Baton Rouge, Edgerton & Humphrey, comm. by C. J. 



Humphrey, 5601; St. Martin ville, A. B. Langlois, bm, H. 2612, 



and 85 the last comm. by Lloyd Herb., 2386 and 1950a, 



comm. by W. G. Farlow (in Mo. Bot. Gard. Herb., 42601). 

 Missouri: Creve Coeur, E. A. Burt (in Mo. Bot. Gard. Herb., 



1757, 14199). 

 Mexico: Jalapa, W. A. & E. L. Murrill, 180, comm. by N. Y. 



Bot. Gard. Herb, (in Mo. Bot. Gard. Herb., 44968). 

 Cuba: Baracoa, L. M. Underwood & F. S. Earle, 1210, comm. by 



N. Y. Bot. Gard. Herb. 

 Japan: Hida-Machi, Prov. Bungo, N.Nakayama, comm. by A. 



Yasuda, 96, under the name Corticium Nakayamae Yasuda. 



80. C. involucrum Burt, n. sp. 



Type: in Burt Herb. 



Fructifications broadly effused, closely adnate, thin, somewhat 

 gelatinous, not at all separable, drying olive-buff to snuff-brown, 

 even, conforming to inequalities of the substratum, pruinose, not 

 cracked except where bridging a depression, the margin indeter- 

 minate, thinning out; in section 60-80 (x thick when composed of 1 

 stratum, 120-150 y. when 2 strata are present, colored like the 

 hymenium by the color of the numerous gloeocystidia, each 

 stratum composed of erect, densely arranged hyphae and gloeo- 

 cystidia; hyphae 3 \l in diameter, with outer wall somewhat gelat- 

 inously modified, clothed with short lateral branches up to 6 jx 

 long which are clustered in an involucral cup at the base of the 

 basidium; gloeocystidia brownish-colored, irregular, flexuous, 30- 

 45 X 4-4 J^ (x, very numerous; basidia simple, bearing 4 spores; 

 spores hyaline, even, spherical, 3-4 jx in diameter. 



Fructifications 2-10 cm. long, 1-3 cm. wide. 



Under side of decorticated, decaying logs of frondose species 

 usually one gathering on coniferous wood. Canada, New 

 Hampshire, Vermont, and Cuba. September to December. 



C. involucrum forms a thin brown coating on decaying wood, 

 with aspect somewhat suggestive of a Sebacina or C. lividum but 

 so near the color of the wood and so inconspicuous that it is 

 probably often overlooked; the colored gloeocystidia are addi- 



