[Vol. 13 

 320 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



hymenium; no gloeocystidia; cystidia somewhat incrusted, 75- 

 120 X 9-15 (x, of greatest diameter at the base, usually seated on 

 the incrusted zone, more rarely on the substratum; paraphyses 

 delicate, branching in antler-shaped form ; spores hyaline, globose, 

 l}/2 (i. in diameter, even at first, finally minutely echinulate, 

 borne 4 to a basidium. 



Fructifications 1-4 mm. in diameter, 3 present on an area 

 12 X 15 mm. 



On bark of a frondose species among mosses and lichens in a 

 moist, virgin forest. Mexico. January. 



The small, white fructifications, conspicuous cystidia, antler- 

 shaped paraphyses, and echinulate spores form a unique group of 

 characters distinguishing H. albus. But for the echinulate 

 spores this species could have been placed in Peniophora next to 

 P. phyllophila. 



Specimens examined : 

 Mexico: Orizaba, Nuevo, W. A. & E. L. Murrill, 749a, type, 



comm. by N. Y. Bot. Gard. Herb, (in Mo. Bot. Gard. Herb., 



54654). 



H. epiphyllus (Schw.) Burt, n. comb. 



Hydnum epiphyllum Schweinitz, Am. Phil. Soc. Trans. N. S. 4 : 

 163. 1832. Hypochnus granulosus (Peck) Burt, Mo. Bot. Gard. 

 Ann. 3: 218. textf. 9. 1916, where additional synonymy is given. 



Type: in Farlow Herb, from Schweinitz Herb, and probably in 

 Schweinitz Herb, and at Kew, under the name Hydnum epiphyl- 

 lum. 



In Curtis Herb, of Farlow Herb, there are specimens of this 

 species under the name Hydnum epiphyllum, collected in Ala- 

 bama, Peters, 112 %, and also under the herbarium name, Odontia 

 grandinia, collector Peters, 1116. 



H. filamentosus Burt, n. sp. 



Type: in Mo. Bot. Gard. Herb. 



Fructifications effused, small, closely adnate, very thin, hypoch- 

 noid-arachnoid, Mars-brown but this color completely soluble in 

 dilute potassium hydrate solution; hymenium not continuous and 

 showing many ends of fibrils under a lens, the margin thinning out; 



