1926] 



BURT THELEPHORACEAE OF NORTH AMERICA. XV 291 



C. canadense has beautiful fructifications with buff hymenium 

 and sulphur-colored margin. The occurrence on pine, stratose 

 structure in section, and the buried strata fuscous in color afford 

 more ample confirmatory distinctive characters than we usually 

 find in resupinate species. 



Specimens examined : 

 Canada: Ontario, Ottawa, J. Macoun, 26, type (in Burt Herb., 



N. Y. State Mus. Herb., and Mo. Bot. Gard. Herb., 55909). 

 New Hampshire: Chocorua, W. G. Farlow (in Mo. Bot. Gard. 



Herb., 6766), 8, and E. A. Burt, 



99. C. bicolor Peck, Buffalo Soc. Nat. Hist. Bui. 1 : 62. 1873; 

 N. Y. State Mus. Rept. 26: 72. 1874; Sacc. Syll. Fung. 6: 630. 

 1888; Massee, Linn. Soc. Bot. Jour. 27: 157. 1890. 



Type: in N. Y. State Mus. Herb. 



Fructifications widely effused, thin, membranaceous, tender, 

 small pieces separable when moist, white, becoming pale pinkish 

 buff to cream color in the herbarium, even, continuous, not 

 cracked, the subiculum wax-yellow throughout, byssoid, the 

 margin yellow to wax-yellow, often running out into wax-yellow 

 rhizomorphic strands; in section 200-300 (j. thick, yellow near the 

 substratum and usually throughout, color not changed by lactic 

 acid but bleached by potassium hydrate solution; the hyphae 

 loosely interwoven, delicate, 2J^ (i in diameter, somewhat rough 

 or incrusted with small crystals; no gloeocystidia; spores hyaline, 

 even, subglobose, 2 y. in diameter or 3 X 2 \l, copious. 



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



On under side of fallen limbs and decaying wood on the ground, 

 usually on pine and other conifers but also on Populus. New 

 Hampshire to New Jersey and in Montana and Washington. 

 August to November. Uncommon. 



C. bicolor is a beautiful species related to C. sulphureum, from 

 which it constantly differs in occurring nearly always in fertile 

 condition with a compact whitish, even hymenium borne on the 

 brilliant, wax-yellow subiculum. The hyphae and spores are 

 similar to those of C. sulphureum. 



Specimens examined : 

 New Hampshire: Chocorua, A. P. D. Piguet, comm. by W. G. 



