1918] 



BURT THELEPHORACEAE OF NORTH AMERICA. X 317 



Brazil : Eio Grande do Sul, J. Rick, in Eick, Fungi Austro- 



Am., 31. 

 Paraguay: in Balansa, PI. du Paraguay, 3916 (in Kew Herb.). 

 Chile: Central Chile, R, P. Natcmiel Costes (in N. Y. Bot. 



Gard. Herb., and in Mo. Bot. Gard. Herb., 44782). 



7. H. borealis Burt, n. sp. 



Type : in Burt Herb. 



Fructifications thin, pliant, imbricated, reflexed, attenuated 

 towards the base, or umbonate-sessile and attached along one 

 side, radiately fibrilloso, concentrically ridged, Brussels- 

 brown to cinnamon-brown ; hymenium 

 even, not cracked, snuif -brown; in 

 structure 240-340 /x thick, with the 

 setigerous layer 60 ^ thick, and with _^^^^^^^^___ 

 the hyphal layer not bordered on ^^^fe^^^^ 

 either side by a dense, dark zone, and Fig. 5 



having its hyphae rather loosely in- ^- borealis. 



i Ti 'iTn 1 Section X 68. From type. 



terwoven and longitudmally arranged, g^e pi. le, f. 6. 



colored, 2 J /* in diameter; setae scat- 

 tered, 60-90 X7|-10 /z, emerging up to 60 fi, starting from all 

 parts of the setigerous layer; spores hyaline, even, 4^6x2-3 /x. 



Fructifications 8-12 mm. in diameter, reflexed portion up 

 to 4 mm. long. 



On decorticated frondose wood. Ontario to New Jersey. 

 October to April. Eare. 



H. horealis is distinguished by having a simpler structure 

 in section than any other of the pileate species which occur 

 in the north. The absence of dark, dense zones bordering on . 

 an intermediate layer separates it at once from H. hadio- 

 ferruginea, H. attenuata of the East Indies is a closely re- 

 lated species but the latter has its pileus strigose-hirsute. 



Specimens examined: 

 Ontario: London, J. Dearness, 1017 (in N. Y. Bot. Gard. 



Herb., and in Mo. Bot. Gard. Herb., 55513). 

 Vermont : Abby Pond, Eipton, E. A, Burt, type. 

 New Jersey: Newfield, J. B. Ellis (in N. Y. Bot. Gard. Herb., 



and in Mo. Bot. Gard. Herb., 55503). 



