c^ 



1917] 



BURT THELEPHORACEAE OF NORTH AMERICA. VIII 253 



On white oak bark. Lake Geneva, Wisconsin. July. 



This collection was at first referred to C. olivascens, but it 

 differs from it in having no olivaceous component in its color, 

 and its spores are subglobose and slightly subangular and its 

 hyphae not nodose-septate. The fructifications are suggestive 

 of Corticium ara^hnoideum in forming a delicate hymenial 

 pellicle which is supported on a very thin and loose subicu- 

 lum, but the hymenium and the spores are colored. 



Specimens examined: 

 Wisconsin: Lake Geneva, E. T. S S. A. Harper, 958, type. 



11. C. dryina (Berk. & Curtis) Massee, Linn. Soc. Bot. ^ ^'"v*^ 

 Jour. 25 : 135. 1889. 



Corticium dryinum Berk. & Curtis, Grevillea 1 : 179. 1873 ; 

 Sacc. Syll. Fung. 6 : 634. 1888. 



Type : type and cotype in Kew Herb, and ^^ Q 

 Curtis Herb, respectively. c^ 



Fructification effused, thick, dry, adnate, 

 velvety, drying snuff-brown both externally 

 and within; hymenium even, velvety; in 

 structure 500-1000 n thick with (1) next 

 to the substratum a thin layer composed 

 of closely interwoven, thick-walled, rigid 

 hyphae 4r-4% ii in diameter, nodose-septate, 

 not incrusted, concolorous with the fructi- 

 fication, and with (2) a broad stratose hy- Fig. ii 

 menial layer made up of about 4 or 5 sets ^^^.^^' If"^^;,,^^^. 

 of hymenia and supporting subhymenial tion showing stratose 



, , 1 1 XT, I,* structureX45; 



layers whose hyphae are erect, branching, gpores x 665. 

 concolorous, 4-4% /i in diameter; no cys- 

 tidia ; basidia colored like the fructification, with 4 sterigmata ; 

 spores concolorous with the fructification, even, curved, 

 pointed at the place of attachment, 8-9x3y2-4 /i. 



Fructification probably large, in the specimens known being 

 about 4 cm. long, 3 cm. broad, and not having the original 

 margin. 



On rough surface of decaying oak wood. Alabama. No- 

 vember. 



