1916] 



BURT THELEPHOEACKA.E OF ISTOETH 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/a in diame- 

 ter, a few running next to and parallel with 

 the substratum and giving off suberect, 

 loosely interwoven branches of the same 

 color, 3i/2-4i/i>it'i in diameter; basidia with 4 -pig. 23 



sterigmata; spores bister under the micro- H. fuUgineus. 

 scope, globose or subglobose, echinulate, the ^ ^' ^^^^ 

 body 6-7 fi in diameter, or 6-9 X 6-7/x; no color change by 

 KHO solution. 



Fructification 4-10 cm. long, 2-4 cm. broad. 

 On rotten frondose wood. New England and Wisconsin. 

 August and September. 



H. fnligineus is much thicker, firmer, and more spongy than 

 H, atroruher 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. fuUgineus as a subspecies of H. spongiosus but this seems 

 precluded by the importance of color characters in Hypoch- 

 nus. 



Specimens examined: 

 New Hampshire: Chocorua, W. G. Farlow, 4, type. 

 Vermont: Middlebury, E. A. Burt. 



Massachusetts: Magnolia, W. G. Farlow, d, and an unnum- 

 bered collection of 1903. 

 Wisconsin: Blue Mounds, E. T. S S. A. Harper, 878. 



O 24. H. cinerascens Karsten, Soc. pro Fauna et Flora Fen- 

 nica Meddel. 16 :2. 1888 ; Finl. Basidsv. 441. 1889 ; Sacc. Syll. 

 Fung. 9:244. 1891; Bresadola, Ann. Myc. 1:108. 1903. 



Tomentella cinerascens (Karst.) v. Hohnel & Litschauer, 

 K. Akad. Wiss. Wien Sitzungsber. 115 :1570. 1906. 



Type: authentic specimen in Burt Herb. 



