[Vol. 3 

 210 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



H. ruhiginosu^ is very similar in color throughout to H. 

 ferrngineus but differs in being membranaceous, in having 

 spores aculeate rather than spinulose, and in having some 

 hyphae parallel with substratum and occasionally forming 

 rope-like strands. These strands are not mentioned by 

 Bresadola in his description, but they are present in prepara- 

 tions from the specimen received from him and also in those 

 from the few American collections referable to this species. 



Specimens examined : 

 Hungary: on leaves of Juniperus and Quercus, Oct., 1888, 



Kmet, comm. by G. Bresadola, apparently part of type. 

 Canada: Lower St. Lawrence Valley, J. Macoun, 77. 

 New York: Greenbush, C. H. Peck, type of Zygodesm\is 



ruhiginosus (in Coll. N. Y. State) ; Alcove, C. L. Shear, 



1329; Syracuse, L. M. Underwood, 36, 41 (both in Coll. N. 



Y. State). 

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

 British Columbia: Sidney, J. Macoun, 80, in part (in Mo. 



Bot. Gard. Herb., 8935). 



3. H. subferrugineus Burt, n. sp. 



Type : in Burt Herb. 



Fructification effused, dry, membranaceous, separable from 



the substratum as a thin membrane, tomentose, drying Sudan- 

 brown, with surface often granular in the 

 center; structure in section 300-400iLt thick, 

 composed of (1) a few dark-colored, nodose- 

 septate hyphae 5-6^1 in diameter, running 

 parallel with the substratum, loosely inter- 

 woven or sometimes in rope-like strands 



IT u/^' • which give off (2) suberect, bright-colored, 



H. subferrugineus. ° ^ ' . , 



Hypha, sporex640. intcrwoveu branches, concolorous with the 



hymenium, bearing the basidia; basidia 4- 

 spored; spores concolorous with the hymenium, subglobose, 

 echinulate, with spore body 7-9 X 6-8iu, ; some color is dissolved 

 from the sections when they are treated with KHO solution. 

 Fructifications 2-5 cm. long, about 2-3 cm. broad. 



