1926] 



BURT THELEPHORACEAE OF NORTH AMERICA. XV 211 



but is colored differently, tending towards light ochraceous-buff 

 in the more central parts of the fructification; this color, occur- 

 rence on old pine and spruce, the wide cracks from drying, and 

 loose attachment to substratum and tendency to scale away from 

 it of the rectangular masses of the dried fructification are helpful 

 characters in recognizing the species. C. illaqueatum, occurring 

 on Castanea in France, is closely related. 



Specimens examined : 

 Exsiccati: Ravenel, Fungi Am., 127, type distribution. 

 Canada : Lower St. Lawrence Valley, J. Macoun, 71 , 75; Ontario, 



Temagami, H. von Schrenk (in Mo. Bot. Gard. Herb., 57051). 

 Maine: Penobscot County, W. A. Murrill, 1821 (in N. Y. Bot. 



Gard. Herb., Burt Herb., and Mo. Bot. Gard. Herb., 59676). 

 New Hampshire: Chocorua, W. G. Farlow, 10, and two other 



gatherings. 

 Vermont: Middlebury, E. A. Burt 

 New York: Osceola, C. H. Peck (in N. Y. State Mus. Herb., and 



Mo. Bot. Gard. Herb., 59674, 59676). 

 Maryland: Takoma Park, C. L. Shear, 1066. 

 South Carolina: Aiken, H. W. Ravenel, in Ravenel, Fungi Am., 



127. 

 Idaho: Addie, E. E. Hubert, comm. by J. R. Weir, 11989 (in Mo. 



Bot. Gard. Herb., 63352). 

 Arizona: Flagstaff, W. H. Long, 19494 (in Mo. Bot. Gard. Herb., 



44768, 44769); Interior Basin, San Francisco Peaks, W. H. 



Long, 21309, in part (in Mo. Bot. Gard. Herb., 54890). 



27. C. Stevensonii Burt, n. sp. 



Type: in Mo. Bot. Gard. Herb. 



Fructifications effused, rather thick, fleshy-membranaceous, 

 small pieces separable, becoming cartridge-buff to cream-buff in 

 the herbarium, perhaps white when growing, ceraceous, slightly 

 colliculose, becoming somewhat cracked in drying, the margin 

 narrow, similar; in section 400-450 \l thick, not colored, with an 

 incrusted subhymenial zone, the hyphae 3-3 */ v- m diameter, not 

 nodose-septate, rather thick-walled and rigid, loosely interwoven 

 and rising obliquely to the base of the compact subhymenium, 

 conspicuously incrusted for a length of about 30 (jl in the incrusted 



