1925] 



BURT THE THELEPHORACEAE OF NORTH AMERICA. XIV 261 



dric, 50-90 X 6-9 \l, protruding up to 45 ^, very numerous in 

 the hymenium; basidiospores hyaline, even, 7-8 X 4-5 \l, copious, 

 four to a basidium; other spherical spores V/v-A y. in diameter 

 are present in addition to immersed basidiospores in the buried 

 hymenium. 



Fructification 2J/2 cm. long, 2 cm. wide, broken off at both ends. 



On wood of coniferous log and bark of Fraxinus. Canada and 

 New York. September and October. 



The type of P. canadensis somewhat resembles P. pubera in 

 aspect but has texture more suggestive of Coniophora byssoidea. 

 Such aspect, together with the coarse hyphae, large spores, and 

 numerous large cystidia should fix the species. Unfortunately, 

 the type consists of but a single piece of the dimensions stated, 

 which was present in a packet of Corticium bombycinum. The 

 New York gathering consists of a group of very small fructi- 

 fications only one stratum thick. 



Specimens examined: 

 Canada: locality not given, J. Macoun, 60 (in part), type. 

 New York: Ithaca, G. F. Atkinson, Cornell Univ. Herb., 8282. 



44. P. cremea Bresadola, Fungi Trid. 2: 63. pi 173, f. 2. 

 1898; Sacc. Syll. Fung. 16: 195. 1902; Bourdot & Galzin, Soc. 

 Myc. Fr. Bui. 28: 396. 1913; Wakefield, Brit. Myc. Soc. 

 Trans. 5: 131. 1914; Rea, Brit. Basid. 691. 1922. 



Kneiffia cremea Bresadola, Ann. Myc. 1: 100. 1903. An 

 Corticium Eichlerianum Bresadola, Ann. Myc. 1 : 95. 1903? 



Type: in Bresadola Herb, probably, authentic specimens in 

 Burt Herb. 



Fructifications broadly effused, membranaceous, separable, 

 white or cream-color to ochraceous buff and darkening somewhat 

 in the herbarium, sometimes cracking when dry and showing the 

 whife subiculum, the margin white and cobwebby; in section 

 100-300 \l, rarely 500 pi, thick, not colored, composed of a broad 

 layer next to the substratum of thick- walled, hyaline, erect hyphae 

 4/^-6 (a in diameter, branching at a wide angle, sometimes dichot- 

 omously, more or less granule-incrusted towards the hymenial 

 layer; hymenial layer dense, bearing protruding cystidia even- 

 walled or incrusted about the apex and containing also immersed, 



