1926] 



BURT THELEPHORACEAE OF NORTH AMERICA. XV 321 



in section up to 90 [l thick in some places but with much thinner 

 connecting portions and mycelial strands in the same section, 

 colored but wholly bleached by action of potassium hydrate 

 solution, the hyphae incrusted, 4-5 y. in diameter, often together 

 in rope-like strands up to 18 y. in diameter with crystalline matter 

 on the outer surface of the strands; basidia 15 X5|i, with 4 

 sterigmata, protruding from the covering matter of the strands, 

 few observed; spores attached to the basidia are hyaline (after 

 treatment of the sections with potassium hydrate solution), 

 subglobose, rough, 3 y. in diameter; no cystidia. 



Fructifications 1-4 mm. in diameter, somewhat confluent for a 

 length of 2 cm. 



On small fragments of blackened, decaying wood of a frondose 

 species apparently on the under side next to the ground. 

 Cuba. March. 



The specimen upon which the description is based is scantily 

 developed; collections with normal continuous hymenium will 

 probably eventually be made. The distinguishing characters 

 seem to be Mars-brown color, complete bleaching by potassium 

 hydrate solution, numerous rope-like strands, hyphae thin- 

 walled, incrusted, collapsing, and small subglobose spores. 



Specimens examined : 

 Cuba: locality not stated, C. G. Lloyd, 4%4, type (in Mo. Bot. 



Gard. Herb., 55174). 



H. fumosus Fr. 



To the synonymy of this species in Mo. Bot. Gard. Ann. 3: 239. 

 1916, should be added Odontia tenuis Peck, N. Y. State Mus. 

 Rept. 44: 134. 1891. Study of the type in N. Y. State Mus. 

 Herb, shows the outer surface overrun with the intricate, branch- 

 ing, anastomosing, mycelial threads, and the spores white, mi- 

 nutely echinulate, 4-4^ X 2}^ ix both characteristic of H. 

 fumosus. 



H. pallidofulvus (Peck) Burt, n. comb. 



Zygodesmus pallidofulvus Peck, N. Y. State Mus. Bui. 105: 30. 

 1906; Sacc. Syll. Fung. 22: 1358. 1913. Hypochnus subfer- 

 rugineus Burt, Mo. Bot. Gard. Ann. 3: 210. 1916. 



