[Vol. 3 

 224 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



but composed for the most part of siiberect, brancliing, 



loosely interwoven, nodose-septate, tliick- 

 Avalled liypliae concolorous with tlie fruc- 

 tification, 4—6ix in diameter; basidia with 

 4 sterigmata; spores concolorous with the 

 fructification, subglobose, sometimes flat- 

 tened on one side, echinulate, the body 



H. plnnosus. ^-8 X 5-7/x. ^ 



Spore, hypha x640. Fructification 3-6 cm. long, 1^/^-3 cm. 



broad. 



On rotten wood and bark, usually of frondose species, and 

 on the ground in woods. Canada to Louisiana; occurs in 

 Europe also. September to December. Probably common. 



H. pannosus and H. isahellinus are species of brown color 

 approaching clay-color, and of cottony surface, which cannot 

 be distinguished from each other with certainty except by 

 microscopic characters. Well-developed fructifications of H. 

 pannosus are thicker than those of H. isahellinus but thin 

 fructifications of the former are frequently collected. H. 

 pannosus has nodose-septate hyphae 4— 6/^ in diameter, while 

 the hyphae of H. isahellinus are not nodose-septate and next 

 to the substratum are 8-10/a, or more, in diameter, and occa- 

 sionally 15^1 in diameter. KHO solution produces no note- 

 worthy color change. The collection from Washington, re- 

 ferred with doubt to this species, has the spores with body 

 6 X 4V2M, aculeate with scattered, very short points. 



Specimens examined: 



Sweden: Stockholm, L. Romell, 225; Femsjo, L. Romell, 228. 



Canada : Quebec, Ironsides, J. Macoun, 277a. 



New HamiDshire: Chocorua, W. G. Farloiv, 7, 8, and an 



unnumbered specimen; Shelburne, W. G. Farloiv, 1. 

 Vermont: Middleburv, E. A. Burt. 

 Massachusetts: Magnolia, W. G. Farloiv; c; Williamstown, 



W. G. Farlow, 5. 

 South Carolina: Santee Canal, Bavenel, 1117, cotype (in 



Curtis Herb., 3007). 

 Louisiana: St. Martinville, A. B. Langlois, cs. 



