19261 



BURT — THELEPHORACEAE OF NORTH AMERICA. XV 237 



Tjrpe: 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 tj, 

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

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

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

 even, 4^-6 X 3 [x, borne 4 to a basidium. 



Fructifications 1-3 cm. long, Yt-^Yi 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. Martin ville, 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 (x thick, not colored, with the hyphae about 3 [x 

 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 23^-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. 



