1925] 



BURT THE THELEPHORACEAE OF NORTH AMERICA. XIV 229 



Fructifications in fragments 5 mm.-2 cm. long, 5-10 mm. wide. 



On very rotten wood of stump of orange tree (Citrus). Louisi- 

 ana. December. 



The fructifications of P. albofarcta are scarcely distinguishable 

 in color from the rotten wood upon which grown. The occurrence 

 on Citrus wood, velvety hymenium, globose spores, and thick and 

 loosely interwoven subiculum seem good, distinctive characters. 



Specimens examined : 

 Louisiana: Point a la Hache, A. B. Langlois, 894, type (in N. Y. 



Bot. Gard. Herb., Mo. Bot. Gard. Herb., 63729, and Burt 



Herb.). 



14. P. longispora (Pat.) v. Hohnel, Ann. Myc. 3: 325. 1905; 

 Bourdot & Galzin, Soc. Myc. Fr. Bui. 28: 392. 1913; Rea, Brit. 

 Basid. 690. 1922. 



Hypochnus longisporus Patouillard, Jour, de Bot. 1894: 221. 

 1894; Sacc. Syll. Fung. 11: 130. 1895. Kneiffia longispora 

 (Pat.) Bresadola, Ann. Myc. 1 : 105. 1903. 



Fructifications widely effused, thin, pubescent, hypochnoid, 

 not separable, white, becoming pale smoke-gray to pale olive- 

 buff in the herbarium, the margin thinning out; in structure 

 30-120 [i thick, not colored, composed of suberect, loosely ar- 

 ranged, thin-walled, rough-walled, nodose-septate hyphae 2}^- 

 3 p. in diameter, and of cystidia; no gloeocystidia; cystidia acicular, 

 rough- walled, 40-80 X 3-4 p., protruding up to 60 n; spores 

 white in spore collection, even, 6-15 X 2J^-3 \l. 



Fructifications 3-10 cm. long, 1-5 cm. wide. 



On bark and decaying wood of frondose species usually es- 

 pecially Populus rarely on conifers. In Europe and Africa and 

 from Maine to Louisiana, Montana to Washington, and in the 

 West Indies. July to March. Frequent. 



P. longispora is well marked by its thin, white fructifications, 

 hyphae, and needle-shaped cystidia rough or somewhat barbed 

 with minute crystals, and the slender spores. There are few 

 resupinate species which may be more confidently recognized. 



Specimens examined: 

 Sweden: Lappland, L. Romell, 316; Stockholm, L. Romell, 411. 

 Poland: Russian Poland, Eichler, comm. by G. Bresadola. 



