1925) 



BURT — THE THELEPHORACEAE OF NORTH AMERICA. XIV 319 



from the latter, the more common species, it is distinguished by- 

 its cystidia and from both by the immersed, spherical, colored 

 masses near the substratum, such as were described and figured 

 for another species with larger spores as gloeocystidia by von 

 Hohnel & Litschauer in K. Akad. Wiss. Wien Sitzungsber. 116: 

 838. 1907. 



Specimens examined: 

 Exsiccati: Sydow, Myc. Germ., 1. 

 Sweden: Femsjo, E. A. Burt, two gatherings. 

 Germany: Brandenburg, P. Sydow, type distribution, in Sydow, 



Myc. Germ., 1, and comm. by Bresadola. 

 New York: Floodwood, C. H. Peck, 8. 

 Washington: Sedro WooUey, C. /. Humphrey, 7538. 



90. P. typhicola Burt, n. sp. 



Type: in Burt Herb. 



Fructifications effused, thin, adnate, somewhat membrana- 

 ceous, tender, between whitish and pale olive-buff in the her- 

 barium, even, not shining, not cracked, the margin thinning out, 

 indeterminate ; in section 60-75 [x thick, not colored near the sub- 

 stratum, composed of suberect, densely interwoven, thin-walled 

 hyphae 2-3 [i in diameter, indistinct, and of incrusted cystidia 

 and a few gloeocystidia; gloeocystidia flexuous, 25-30 x 4-6 jx, 

 few present; cystidia incrusted, 40 x 15 [jl, immersed, starting 

 from the substratum; paraphyses with filiform tips about 3^-1 (x 

 in diameter, with 1 or 2 lateral branches but not antler-shaped, 

 in surface of hymenium; spores hyaline, even, 8-12 x 33^^-4 (x, 

 two to a basidium. 



Fructifications 2-10 mm. in diameter. 



On dead Typha latifolia. New York. 



This specimen was at first doubtfully referred to P. phyllophila 

 which it resembles in aspect and somewhat in structure, but it is 

 thicker, more dense, has gloeocystidia, and does not have con- 

 spicuous antler-shaped paraphyses. Reference to Epithele Ty- 

 phae, which I have been unable to find in our North American 

 species, is precluded by the absence of hyphal fascicles. 



Specimens examined: 

 New York: Ithaca, G. F. Atkinson, 261, type. 



