[Vol. 3 

 210 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



H. rubiginosus is very similar in color throughout to H. 

 ferrugineus 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, 0. U, Peckj type of Zygodesmus 



rubiginosus (in Coll. N. Y. State) ; Alcove, G. L. Shear, 



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



Y. State). 

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

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



Bot. Gard. Herb., 8935). 



^ \ 3. H. subf ferrugineus 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 300-400/4, thick, 

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

 septate hyphae 5-6/* in diameter, running 

 parallel with the substratum, loosely inter- 

 woven or sometimes in rope-like strands 



H. suMe^mgineus. ^^^^^ ^^^ off (2) subcrect, bright-colored, 

 Hypha, sporex640. intcrwoven branches, concolorous with the 

 hymenium, bearing the basidia; basidia 4- 

 spored; spores concolorous with the hymenium, subglobose, 

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

 from the sections when they are treated with KHO solution. 

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



