1925] 



BURT — THE THELEPHORACEAE OF NORTH AMERICA. XIV 253 



Florida: Tarpon Springs, W. A. Murrill, 216, comm. by N. Y. 



Bot. Gard. Herb, (in Mo. Bot. Gard. Herb., 62121). 

 Alabama: Montgomery, R. P. Burke, 3, 158 (in Mo. Bot. Gard. 



Herb., 17431, 44962). 

 Texas: Austin, W. H. Long, 524- 

 Cuba: C. G. Lloyd, 421 (in Mo. Bot. Gard. Herb., 55172); El 



Yunque Mt., Baracoa, L. M. Underwood & F. S. Earle, 1215, 



tj^e, comm. by N. Y. Bot. Gard. Herb. 

 Bermuda: Paget Swamp, H. H. Whetzel, Abe (in Mo. Bot. Gard. 



Herb., 58905). 



38. P. isabellina Burt, n. sp. 

 Type: in Burt Herb. 



Fructifications longitudinally effused, very thin, closely adnate, 

 not at all separable, between light pinkish cinnamon and avel- 

 laneous, not shining, becoming somewhat minutely cracked, the 

 margin thinning out; in section 50-75 [x thick, not colored, com- 

 posed of innumerable cystidia and densely arranged hyphae 

 23^-3 (x in diameter, indistinct; no gloeocystidia ; cystidia in- 

 crusted, 30 X 6 [X, protruding up to 12 [i, fusoid, usually starting 

 from the substratum; spores 6 X 3 (x present but so few found 

 that they may not belong. 



Fructification 8 cm. long and broken off at both ends, 1 cm. 

 broad. 



On dead canes of blackberry (Rubus), and perhaps on other 

 frondose wood. Virginia and Alabama. June to September. 



P. isabellina is as closely adnate as P. cinerea and P. versicolor, 

 from both of which it differs in not being colored in section. The 

 occurrence of the type on blackberry stems may be helpful in 

 recognizing this species, but several other species also occur on 

 blackberry stems. The specimen from Alabama, referred to 

 P. isabellina, is probably specifically distinct. 



Specimens examined : 

 Virginia: Woodstock, C. L. Shear, 1191, type. 

 Alabama: Montgomery County, R. P. Burke, 62 (in Mo. Bot. 



Gard. Herb., 18207). 



39. P. coccineo-fulva (Schw.) Burt, n. comb. 



Phlebia coccineo-fulva Schweinitz, Am. Phil. Soc. Trans. N. S. 



