1926] 



BURT — THELEPHORACEAE OF NORTH AMERICA. XV 267 



aspect of those of resupinate Stereum Murrayi but soft and 

 spongy when moistened. The abundant, slender, curving hyphae 

 show structural relationship with Corticium investiens and Hy- 

 phochnus pallescen^, but I find no antler-shaped branches either 

 at the hymenial surface or in the interior. The globose vesicular 

 bodies are conspicuous and a valuable distinctive character. 



Specimens examined : 

 Cuba: Omaja, C. J. Humphrey, 28 J^. 

 Porto Rico: Rio Piedras, /. A. Stevenson, 579S, type (in Mo. Bot. 



Gard. Herb., 54690), and J. A. Stevenson & R. C. Rose, 6631 



(in Mo. Bot. Gard. Herb., 55652). 



76. C. subalbum Burt, n. sp. 



Type: in N. Y. Bot. Gard. Herb., Mo. Bot. Gard. Herb., an 

 Burt Herb. 



Fructifications effused, very thin, closely adnate, whitish to 

 cartridge-buff in the herbarium, even, not shining, but little 

 cracked, the margin similar, thinning out; in section 75 \l thick, 

 not colored, composed of densely interwoven hyphae about 2 [x 

 in diameter, and of very numerous gloeocystidia which are 

 broadly ovoid to subglobose, up to 30 X 15-18 \i, or 20 (jl in di- 

 ameter; very slender paraphyses with branched tips protrude 

 slightly beyond the basidia; spores hyaline, even, 10^^-13 X 

 4-5 [X, copious. 



Fructifications 3-5 mm. in diameter, clustered near together 

 and becoming confluent in a mass 5 cm. long, 13^2 cm. wide. 



On small dead limbs of Alnus. Georgia and Alabama. No- 

 vember. 



C. subalbum is distinct from other gloeocystidial species by 

 thin, whitish fructifications, rather large spores, abundant gloeo- 

 cystidia, and the slender paraphyses. 



Specimens examined: 

 Georgia: Atlanta, E. Bartholomew, 8983 (in Mo. Bot. Gard. Herb., 



63462). 

 Alabama: Auburn, F. S. Earle, 2300, type (in N. Y. Bot. Gard. 



Herb., Mo. Bot. Gard. Herb., 63375, and Burt Herb.). 



77. C. vinososcabens Burt, n. sp. 

 Type: in Burt Herb. 



