1916] 
BURT—THELEPHORACEAE OF NORTH AMERICA VI 233 
Fructification effused, soft, felty-membranaceous, separable, 
upper surface pinkish buff to Isabella-color, under side and 
margin bister; in structure 200-1200, thick, 
with hyphae bister under the microscope, 
thick-walled, nodose-septate, 5-7» іп diame- 
ter, a few running next to and parallel with 
the substratum and giving off suberect, 
loosely interwoven branches of the same E. 3A 
color, 314-414» in diameter; База with 4 Fig. 23 
sterigmata; spores bister under the micro- _ W. fuligineus. 
scope, globose or subglobose, echinulate, the em 
body 6-7» in diameter, ог 6-9 X 6-7»; no color change by 
KHO solution. 
Fruetifieation 4-10 em. long, 2-4 em. broad. 
On rotten frondose wood. New England and Wisconsin. 
August and September. 
H. fuligineus is much thicker, firmer, and more spongy than 
H. atroruber and H. cinerascens, and differs from them 
further in coloration and in hyphal characters. In its thick 
spongy structure and microscopic details it suggests H. spon- 
giosus to such a degree that I have been disposed to regard 
H. fuligineus as a subspecies of H. spongiosus but this seems 
precluded by the importance of color characters in Hypoch- 
"us. 
Specimens examined: 
New Hampshire: Chocorua, W. G. Farlow, 4, type. 
Vermont: Middlebury, E. 4. Burt. 
Massachusetts: Magnolia, W. G. Farlow, d, and an unnum- 
bered collection of 1903. 
Wisconsin: Blue Mounds, E. T. % S. A. Harper, 878. 
24, H. cinerascens Karsten, Soc. pro Fauna et Flora Fen- 
niea Meddel. 16:2. 1888; Finl. Basidsv. 441, 1889; басс, Syll. 
Fung. 9:244. 1891; Bresadola, Ann. Мус, 1:108. 1903. 
Tomentella cinerascens (Karst.) v. Hóhnel & Litschauer, 
K. Akad. Wiss. Wien Sitzungsber. 115:1570. 1906. 
Type: authentie specimen in Burt Herb. 
