1926] 



BURT THELEPHORACEAE OF NORTH AMERICA. XV 309 



Farlow Herb.); Mt. Akayu, Prov. Echego, A, Yasuda, 22 (in 

 Mo. Bot. Gard. Herb., 55659). 



A. succineus Bresadola, Mycologia 17: 71. 1925. 



Type: in Weir Herb. 



Fructifications small, flattened, becoming disk-shaped by slight 

 elevation of the margin, mouse-gray, pruinose, with the margin 

 thick, entire, becoming free, under side pale; in section 500 |i 

 thick, composed of densely arranged, ascending, thin-walled, 

 hyaline hyphae 3-5 \l in diameter and of numerous gloeocystidia; 

 gloeocystidia flexuous, 75-100 X 8-10 p; paraphyses cylindric, of 

 bottle-brush form, very numerous in the surface of the hymenium ; 

 basidia with 4 sterigmata; spores hyaline, even, ellipsoidal, 10 

 X5pi. 



Fructifications 1-3 mm. long, 1-2 mm. wide. 



On old weathered wood of Arbutus Menziesii. Oregon. Sep- 

 tember. 



A. succineus is readily recognized by its discoid fructifications 

 which have both gloeocystidia and bottle-brush paraphyses. 



Specimens examined : 

 Oregon: Grants Pass, J. R. Weir, 8682 , type (in Weir Herb.). 



A. Zelleri Burt, n. sp. 



Type: in Burt Herb. 



Fructifications resupinate, gregarious, erumpent, pulvinate, 

 convex, pinkish buff to tawny; in section about 600 \l thick, 

 composed of a broad layer of erect, somewhat interwoven hyphae 

 3-33^ ix in diameter, not incrusted, bearing a hymenial layer; no 

 cystidia; gloeocystidia flexuous, 30-40 X 4 n, confined to the hy- 

 menial layer; basidia protruding, with 4 sterigmata; spores hy- 

 aline, even, 6-9 X 4-43^ n, copious. 



Fructifications 3^-1}^ mm. in diameter, about J/ mm. thick 

 10 on an area about 1 cm. square. 



On small dead twigs of a frondose species perhaps Alnus. 

 Oregon. December. 



A, Zelleri may be recognized by its small, tawny, convex 

 fructifications, erumpent from lenticels in the bark and having 

 somewhat the aspect of a Tubercularia. 



