1925] 



BURT THE THELEPHORACEAE OF NORTH AMERICA. XIV 223 



incrusted, fusiform, 25-50 X 9-10 [x, barely protruding, usually 

 immersed in all parts of the hymenial layer; spores published by 

 Bresadola as 53^-63^ X 4-43^ [x but I find the type sterile. 



Fructifications 3-6 cm. long, 1 3^-2 ^ cm. wide. 



On bark of decaying branches and on wood. Brazil and West 

 Indies. August to December. Rare. 



In aspect P. galochroa is somewhat suggestive of Corticium 

 portentosum but much thinner and very different in structure by 

 the presence of cystidia which are confined to a hymenial layer 

 not more than 50 [i thick in the specimens studied. The speci- 

 mens from the West Indies, which I have referred to P. galochroa, 

 have subglobose spores about 3 [x in diameter and are perhaps 

 a distinct species if P. galochroa has as large spores as published 

 by Bresadola, butl find the portion of the type communicated 

 to me wholly sterile. 



Specimens examined: 

 Brazil: Blumenau, A. Moller, type, from Bresadola. 

 Jamaica: Chester Vale, W. A. & E. L. Murrill, 331, 751, comm. 



by N. Y. Bot. Gard. Herb. 

 Porto Rico: Rio Piedras, J". A. Stevenson, 2985 (in Mo. Bot. Gard. 



Herb., 7799). ^ \ 



6. P. odontioides Burt, n. sp. **"** 



Type: in Mo. Bot. Gard. Herb. 



Fructifications effused, very thin, arachnoid-membranaceous, 

 tender, small pieces separable when moistened, white, even, not 

 shining, the margin thinning out, fibrillose; in section 50-130 y. 

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

 suberect hyphae about 4-4J^ {x in diameter, incrusted, becoming 

 collapsed; no gloeocystidia; cystidia of Odontia type, trans- 

 versely septate, cylindric-obtuse, 8 y. in diameter, protruding up 

 to 45 (x, not incrusted or with a few incrusting granules; spores 

 hyaline, even, 9-12 X 4-43/2 V-i copious. 



Fructifications in fragments which are 2-3 cm. long, 5-6 mm. 

 wide. 



On decaying frondose wood. Canada. July to September. 



P. odontioides is distinguished among our thin, white species 

 by having large, cross-septate cystidia such as are common in 



o 



