1926] 



BURT THELEPHORACEAE OF NORTH AMERICA. XV 237 



Type: authentic specimens in Burt Herb. 



Fructifications effused, adnate, membranaceous-thin, loosely- 

 attached to the substratum, small pieces separable when moist, 

 becoming cream-buff in the herbarium, even, not cracked regu- 

 larly, the margin somewhat arachnoid; in section 150-300 ji 

 thick, not colored, composed of loosely interwoven, thin-walled 

 hyphae 3-4 y. in diameter, nodose-septate, with some incrusta- 

 tion next to the substratum; no gloeocystidia ; spores hyaline, 

 even, 4J^-6 X 3 pi, borne 4 to a basidium. 



Fructifications 1-3 cm. long, Yz-V/i cm. wide. 



On bark of decaying Castanea and other frondose species. 

 France and Louisiana. September to January. 



C. illaqueatum has color somewhat like that of C. ceraceum and 

 C. hydnans but is loosely attached to the substratum and has 

 smaller spores than the former and does not crack in drying like 

 the latter. 



Specimens examined: 

 France: Aveyron, H. Bourdot, 16063, and M. Galzin, 12684, 



12689, 15107, comm. by H. Bourdot, 18548, 16092, 12623. 

 Louisiana: St. Martinville, A. B. Langlois, 203. 



47. C. Rosae Burt, n. sp. 



Type: in Mo. Bot. Gard. Herb. 



Fructifications effused, adnate, rather thick, membranaceous, 

 separable, drying Rood's brown, ceraceous, even, contracting in 

 drying and cracking through the hymenial layer into rectangular 

 masses 2-4 mm. in diameter and showing the thick, white, 

 cottony subiculum in the crevices, the margin white, cottony; in 

 section 400-600 \l thick, not colored, with the hyphae about 3 \l 

 in diameter, more or less incrusted in the middle region, not 

 nodose-septate, densely crowded together and arranged longi- 

 tudinally in a broad layer along the substratum, then ascending 

 obliquely and becoming densely interwoven in a thick hymenial 

 layer; no gloeocystidia; spores hyaline, even, 4-7 X 2J^-3 [i as 

 seen attached to the basidia. 



Fructifications received in fragments 2-23^ cm. long, 1 cm. 

 wide broken off on three sides. 



On bark of dead wild rose Rosa sp. British Columbia. 

 February. 



