1924] 



BURT THE THELEPHORACEAE OF NORTH AMERICA. XIII 11 



Fructifications coriaceous, soft, drying horn-like, rigid, pezizoid 

 when young, becoming expanded, more or less confluent, affixed 

 by the center, the margin free all around and upturned, minutely 

 white-villose; hymenium blood-red, even at first, drying somewhat 

 wrinkled; in structure 400-800 \i thick, composed of parallel, 

 longitudinally arranged and ascending hyphae with narrow 

 lumen and walls gelatinously modified; basidia simple, with 2 or 

 4 sterigmata; spores hyaline, even, cylindric, curved, 12-15 X 

 3M~5 t* m American specimens, 16-18 X 6-8 p in European 

 specimens as recorded by Karsten also. 



Fructifications 1-2 mm. in diameter at first, at length up to 

 6-12 mm. long by confluence. 



On dead limbs of Salix. Northern Europe and Canada and 

 northern United States. May to December. Common. 



Rea gives Corticium salicinum as a synonym of Cytidia rutilans 

 (Pers.) Quel., with spores globose, 8 [l in diameter. I do not 

 find a species rutilans in the index of Persoon's 'Synopsis Fungo- 

 rum' for any thelephoraceous genus and have not access to 

 Quelet's 'Fl. Myc. France. ' The globose spores point to a differ- 

 ent species from Corticium salicinum Fries, with an authentic 

 specimen of which, in Kew Herbarium, I compared one of my 

 gatherings. The description of Thelephora cruenta Persoon, Syn. 

 Fung., is too vague to take priority for the specific name over 

 salicinum of Fries. 



Specimens examined: 

 Exsiccati: Bartholomew, Fungi Col., 4218; Ellis, N. Am. Fungi, 



609; Ell. & Ev., Fungi Col., 1212; Shear, N. Y. Fungi, 54; de 



Thumen, Myc. Univ., 114. 

 Sweden: E. Fries (in Kew Herb.). 

 Finland: Mustiala, P. A. Karsten, in de Thumen, Myc. Univ., 



114. 

 Austria: Gastein Salisb., Niessl (in Mo. Bot. Gard. Herb., 



43459); Innsbruck, V. Litschauer. 

 Canada: J. Macoun, 

 Ontario: Byron, J. Dearness, in Bartholomew, Fungi Col., 4218; 



Ottawa, J. M. Macoun, 15, comm. by N. Y. State Mus. Herb. 



(in Mo. Bot. Gard. Herb., 56082) ; Toronto, J. H. Fault, Univ. 



Toronto Herb., 315 (in Mo. Bot. Gard. Herb., 44882). 



