1926] 



BURT THELEPHORACEAE OF NORTH AMERICA. XV 221 



small pieces separable when moistened, whitish to cartridge-buff 

 and light pinkish cinnamon in the herbarium, even, with few 

 cracks, the margin indeterminate, thinning out; in section 200- 

 500 (x thick, not colored, composed of ascending, densely inter- 

 woven and agglutinate, thin-walled hyphae 2^-3 \l in diameter, 

 not incrusted, occasionally nodose-septate; no gloeocystidia; 

 spores hyaline, even, ovoid, 5-9 X 33^-6 [l, copious. 



Fructifications 2-8 cm. long, 1-3 cm. wide. 



On bark of fallen decaying limbs of Betula, Alnus, Salix, and 

 other frondose species. In Europe, from Newfoundland to 

 Louisiana and westward to Manitoba and Washington, in Mexico, 

 the West Indies, Japan, and South Africa. April to December. 

 Common. 



C. confluens may be recognized among our species by its occur- 

 rence on frondose bark in closely adnate fructifications with 

 somewhat the aspect of pale Peniophora incarnata but of different 

 structure, which is distinctive by not being stratose and by having 

 the hyphae agglutinate, and by the presence of large spores. The 

 authentic specimen from Karsten of C. confluens var. subcalceum 

 has spores 9 X 6 [t. and does not have cystidia, differing in both 

 respects from the statement by Bresadola in Ann. Myc. 1 : 102. 

 1903. 



Specimens examined: 

 Sweden: L. Romell, 80, 81, 82, 83, 84- 

 Finland: Mustiala, authentic specimen, perhaps part of type of 



Corticium confluens var. subcalceum Karst. from Karsten. 

 Germany: Lengerich, W. Brinkmann, Westfalische Pilze, 13 (in 



Mo. Bot. Gard. Herb., 63430). 

 Austria: Tirol, Hall, V. Litschauer; Stubai, V. Litschauer. 

 Italy: G. Bresadola, 

 Newfoundland: Bay of Islands, A. C. Waghorne, 983 (in Mo. Bot. 



Gard. Herb., 63747). 

 Canada: Lower St. Lawrence Valley, J. Macoun, 65. 

 Ontario : Eastman's Springs, J. Macoun, 532; Ottawa, J. Macoun, 



29; Woodstock, E. Bartholomew, 6713 (in Mo. Bot. Gard. 



Herb., 57041). 

 New Hampshire: Camp, Ellis R., Underwood & C, 22 (in N. Y. 



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



61585) ; Chocorua, W. G. Farlow. 



