1920] 



BURT THELEPHORACEAE OF NORTH AMERICA. XII 149 



of that of S. hirsutum, should render specimens of the former 

 species easily distinguishable. All gatherings of S. sulphuratum 

 which I have seen had already faded to the gray color of old, 

 weathered S. hirsutum and in this condition are best distin- 

 guished by not having underneath the hairy covering a thin 

 hardened crust as the upper surface of the intermediate layer, 

 nor a dense, somewhat golden zone on the upper border of the 

 intermediate layer when sectional preparations are examined 

 with the microscope. 



S. sulphuratum occurs also in Westphalia, Germany, appar- 

 ently an isolated station, and has been confused there with 

 Stereum ochroleucum Fries, a species of thicker and softer struc- 

 ture having hyphae interwoven instead of densely and longitudi- 

 nally arranged for which reason Fries was doubtful about its 

 being a true Stereum and published the species originally as a 

 Corticium. Collections from Sweden and France communicated 

 to me as cospecific with the Westphalian gatherings have the 

 upper surface of the intermediate layers with a crust-like golden 

 zone and are referable to >S. hirsutum instead. 



Specimens examined: 

 Exsiccati: Brinkmann, Westfalische Pilze, 49, under name of 



Stereum ochroleucum; Rick, Fungi Austro-Am., 260, under 



name of Stereum ochroleucum. 

 Germany: Westphalia, Lengerich, W. Brinkmann, comm. by 



G. Bresadola, and in Brinkmann, Westfalische Pilze, 49. 

 Georgia: Catoosa Springs, H. W. Ravenel (in Kew Herb, and in 



Curtis Herb., 1731). 

 Florida: C.G. Lloyd, 2131. 

 Alabama: Auburn, Ala. Biol. Surv., comm. by F. S. Earle; 



Montgomery, R. P. Burke, 4 (in Mo. Bot. Gard. Herb., 



22017). 

 Mexico: Jalapa, W. A. & E. L. Murrill, 316, 343, comm. by 



N. Y. Bot. Gard. Herb, (in Mo. Bot. Gard. Herb., 54438, 



55477). 

 Cuba: C. Wright, 292, type (in Kew Herb.). 

 Jamaica: Farr (in N. Y. Bot. Gard. Herb, and Mo. Bot. Gard. 



Herb., 56667); Cinchona, W. A. & E. L. Murrill, 480, 



546, comm. by N. Y. Bot. Gard. Herb.; Morce's Gap, 



W. A. & E. L. Murrill, 723, comm. by N. Y. Bot. Gard. 



