[Vol. 3 

 230 ANNALS OF THE MISSOUBI BOTANICAL GAEDEN 



strands 6-15/* in diameter, and (2) with hyphae in the sub- 

 hymenial region densely interwoven; no cystidia; basidia 

 with spores on 4 slender sterigmata; spores olive-ocher, 

 angular-subglobose, aculeate, the spore body 5-6 X 41/2-6/*; 

 KHO solution changes the color of both the olive-ocher and 

 the brownish drab hyphae to sage-green, later olive-gray. 



Fructification 2 cm. long, li/4 cm. broad, with the fertile, 

 olive-ocher portion 5-10 mm. in diameter. 



On dead wood in woods. New York. August. 



The single collection of this species which has been found 

 is conspicuous by its bright olive-ocher hymenial portion 

 surrounded by a brownish drab margin. Both of these colors 

 are destroyed when potassium hydrate solution is brought in 

 contact with sections of the fructification in making micro- 

 scopic preparations, and the hyphae become at once sage- 

 green, later olive-gray. 



Specimens examined: 

 New York : Cascadilla "Wood, Ithaca, C. J. Humphrey, comm. 



by Q. F. Atkinson, Cornell Univ. Herb., 22571. 



20. H. atroruber (Peck) Burt, n. comb. 



Zygodesmus atroruber Peck, Bot. Gaz. 6:277. 1881. 

 Type: in Coll. N. Y. State. 



Fructification effused, membranaceous, separable, tomen- 

 tose, with central portion granular and between walnut- 

 brown and Vandyke-brown, the margin 

 often conspicuously umber or Isabella- 

 color (melleus of Saccardo's 'Chromo- 

 taxia') ; structure in section 300-500/t 

 thick, composed of loosely interwoven 

 thick- walled, nodose-septate hyphae 5-6/i 

 Fig. 20 in diameter, concolorous with the fruc- 



H. atroruber. Spore, tificatiou and Connected with a few rope- 

 like mycelial strands 12-20/i in diameter, 

 which run along the substratum; basidia with 4 sterigmata; 

 spores concolorous with the darker hyphae, subglobose, often 

 flattened on one side, echinulate, the body 6-7 X 5-6/*. 

 Fructifications 3-6 cm. long, 1-3 cm. broad. 



