1925] 



BUKT THE THELEPHORACEAE OF NORTH AMERICA. XIV 335 



Wisconsin: Oconto Falls, C. J. Humphrey, 91+1+5 (in Mo. Bot. 



Gard. Herb., 57176). 

 Colorado: Ouray, C. L. Shear, 1185, type. 

 British Columbia: Agassiz, J. R. Weir, 330 (in Mo. Bot. Gard. 



Herb., 63728); Sidney, J. Macoun, 19 (in Mo. Bot. Gard. 



Herb., 5734). 

 Washington: Olympia, C. J. Humphrey, 631+3; Seattle, C. J. 



Humphrey, 6456; Sedro-Woolley, C. J. Humphrey, 7578 (in 



Mo. Bot. Gard. Herb., 10753). 

 Oregon: Corvallis, on prune bark, Mrs. E. B. Zeller, comm. by 



S. M. Zeller, 1871 (in Mo. Bot. Gard. Herb., 56872) ; Eugene, 



C. J. Humphrey, 6096. 



104. P. fusco-marginata Burt, n. sp. 



Type: in Burt Herb, and probably in Lloyd Herb. 



Fructifications long-effused, membranaceous, separable, be- 

 coming pinkish buff to warm buff in the herbarium, not waxy nor 

 cracked, the extreme margin byssoid, fuscous, colored like the 

 supporting hyphal layer next to the substratum; in section 300- 

 320 [x thick, colored next the substratum, 2-layered with (1) the 

 layer next to the substratum composed of longitudinally ar- 

 ranged hyphae 4-5 \l in diameter, not incrusted, not nodose- 

 septate, fuscous along the substratum, becoming colorless above, 

 and (2) the hymenial layer of equal thickness, composed of color- 

 less, erect hyphae somewhat granule-incrusted in an incrusted 

 zone; no gloeocystidia; cystidia not incrusted, 6 y. in diameter at 

 base, tapering to the apex, protruding up to 30-40 p. beyond the 

 basidia; spores hyaline, even, 5-6 X 3-33^ ji. 



Fructifications 1-10 cm. long, the largest broken off at both 

 ends, Y^-^Yi cm. wide. 



On bark of fallen decaying frondose limbs. Florida and 

 Louisiana. June and July. Local. 



P. fusco-marginata has the unusual character of a colored layer 

 of coarse, fuscous hyphae running over the substratum and only 

 more or less completely covered by the buff, fertile portion of the 

 fructification, so that the protruding colored portion forms a dis- 

 tinctive fuscous margin. The Florida specimen is sterile and too 

 young for confident reference. 



