1925] 



. BURT THE THELEPHORACEAE OF NORTH AMERICA. XIV 305 



Specimens examined : 

 New York: Oneonta, E. A. Burt. 



80. P. versa ta Burt, n. sp. 

 Type: in Burt Herb. 



Fructifications effused, thin, membranaceous, small pieces 

 separable when moistened, becoming pinkish buff in the her- 

 barium, not waxy, the margin thinning out, fibrillose; in section 

 150-300 [l thick, not colored, composed of suberect, interwoven 

 hyphae about 3 pi in diameter, with walls somewhat gelatinously 

 modified, and of gloeocystidia; gloeocystidia numerous, flexuous, 

 35-55 X 6-8 [l; cystidia not incrusted, tapering towards the 

 apex, 6 [i in diameter, protruding up to 40 p., scarcely or perhaps 

 not at all distinguishable from gloeocystidia; basidia with 4 

 sterigmata; spores hyaline, even, 4-5 X 23^-3 \l. 



Fructifications 2-5 mm. long, 5-15 mm. wide. 



On slightly decayed red fir planks and cross-ties. Washington. 

 September and October. 



The fructifications of P. versata stand out conspicuously against 

 the blackened timber upon which they occur. The resemblance 

 of the protruding cystidia to gloeocystidia and the possibility 

 that they have the function of gloeocystidia or may be gloeo- 

 cystidia functioning as cystidia should enable this species to be 

 readily distinguished from species containing cystidia and gloeo- 

 cystidia quite distinct from each other. 



Specimens examined: 

 Washington: Chehalis, C. J. Humphrey, 6285; Edmonds, C. /. 



Humphrey, 7623, type. 



81. P. albo-straminea Bresadola, Mycologia 17: 69. 1925. 

 Type: in Weir Herb. 



Fructifications orbicular, finally confluent and broadly effused, 

 thin, very tender, small pieces separable when moistened, be- 

 coming between cartridge-buff and ivory-yellow in the herbarium, 

 somewhat cracked, even, the margin pruinate; in section 60-90 \k 

 thick, not colored, composed of somewhat loosely arranged 

 hyphae 3-5 [l in diameter, occasionally nodose-septate, and of 

 gloeocystidia; gloeocystidia flexuous to zigzag, 40-60 X 43^-6 y., 



