1926] 



BURT — THELEPHORACEAE OF NORTH AMERICA. XV 271 



Mississippi: Hattiesburg, C. J. Humphrey, 6454- 



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



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



and 35 — 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 Cortidum 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 \i. thick when composed of 1 

 stratum, 120-150 [i 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 (x in diameter, with outer wall somewhat gelat- 

 inously modified, clothed with short lateral branches up to 6 ;x 

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

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

 45 X 4-4^ [JL, very numerous; basidia simple, bearing 4 spores; 

 spores hyaline, even, spherical, 3-4 [x 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- 



