[Vol. 13 

 306 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



Grevillea 8: 20. pi. 122, f. 2. 1879; Sacc. Syll. Fung. 6: 642. 

 1888. 



Fructifications effused, disciform, rather thick, pale olive-buff 

 to cartridge-buff in the herbarium, pulverulent to velutinous, 

 even, becoming somewhat cracked, the margin free, narrow, some- 

 what elevated, somewhat ochraceous on the under side; in section 

 150-800 \l thick, not colored, composed of erect, densely arranged 

 hyphae 3-4 (x in diameter, with a great deal of crystalline matter 

 intermixed; paraphyses 4J^-6 ji in diameter, cylindric, sometimes 

 becoming irregularly swollen, sometimes somewhat moniliform 

 toward the apex; spores hyaline, even, 16-20 X 11-15 \l. 



Fructifications ^-2J^ cm. in diameter, or Yr^Vi cm. long, 

 3^-1 cm. wide. 



On bark of Quercus. Europe, Mexico, and Africa. August to 

 May. 



A. disciformis is a species whose large fructifications resemble 

 in aspect those of A. candidus although not as white as the latter 

 and with paraphyses related in form to those of A. amorphus. 



Specimens examined: 

 Austria: Vienna, V. Litschauer. 

 Italy: Trentino, G. Bresadola. 

 France: Aveyron, M. Galzin, 9503, comm. by H. Bourdot, 18550; 



locality not stated, Mougeot (in Farlow Herb.). 

 Mexico: locality not stated, A. Dampf (in Weir Herb.), 

 r* Africa: Union of South Africa, Stellenbosch, P. A. van der Bijl, 



658 (in Mo. Bot. Gard. Herb., 59358). 



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



Type: in Weir Herb. 



Fructifications erumpent, pulvinate to short-clavate, sessile, 

 rugulose, waxy, somewhat gelatinous, Hay's brown, drying some- 

 what fuscous; hyphae hyaline, not incrusted, 4^-6 [jl in diam- 

 eter; no conducting organs; basidia simple, large, 45-80 X 6- 

 8 [l, with 2-4 sterigmata; spores hyaline, even, 18-21 X 6-9 (x 

 according to Bresadola; hymenium surrounds the clubs on ail 

 sides. 



Fructifications about 2 mm. high and 1 mm. in diameter when 

 moistened. 



