1918] 
BURT—THELEPHORACEAE OF NORTH AMERICA. X 317 
Brazil: Rio Grande do Sul, J. Rick, in Rick, Fungi Austro- 
59b 
Paraguay: in Balansa, Pl. du Paraguay, 3916 (in Kew Herb.). 
Chile: Central Chile, R. P. Nataniel Costes (in N. Y. Bot. 
Gard. Herb., and in Mo. Bot. Gard. Herb., 44782). 
7. H. borealis Burt, n. sp. 
Type: in Burt Herb. 
Fruetifieations thin, pliant, imbricated, reflexed, attenuated 
towards the base, or umbonate-sessile and attached along one 
side, radiately fibrillose, concentrically ridged, Brussels- 
brown to cinnamon-brown; hymenium 
even, not cracked, snuff-brown; in Mi. dele 
structure 240-340 ц thick, with the Poem 
setigerous layer 60 д thick, and with 
the hyphal layer not bordered on  Бь 2 7 
either side by а dense, dark zone, and Fig. 5 
having its hyphae rather loosely in- H. borealis. 
. . Seetion Ас e pe pe 
terwoven and longitudinally arranged, See pl. 16, f. 6 
colored, 24 р in diameter; setae scat- 
tered, 60-90 74-10 и, emerging up to 60 и, starting from all 
parts of the setigerous layer; spores hyaline, even, 4-6 2-3 д. 
Fructifications 8-12 mm. in diameter, reflexed portion up 
to 4 mm. long. 
On decorticated frondose wood. Ontario to New Jersey. 
October to April. Rare. 
H. borealis 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. badio- 
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, Ripton, E. А. Burt, type. 
New Jersey: Newfield, J. B. Ellis (in N. Y. Bot. Gard. Herb., 
and in Mo. Bot. Gard. Herb., 55503). 
