[Vol. 6 



54 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



The original description of Ar ccmg eliella Borziana has been 

 amplified here to include some characters which Cavara gave 

 in his discussion of the species. 



GYMNOMYCES 



Gymnomyces Massee & Rodway, Kew Bui. Misc. Inf. 1898: 

 125. 1898 ; Saccardo & Sydow in Sacc. Syll. Fung. 16 : 249. 

 1902. 



Type : Gymnomyces pallidus and G. seminudus were pub- 

 lished simultaneously with no reference to type. 



Fructifications globose to irregular; peridium delicately 

 downy or silky to evanescent, or entirely wanting; columella 

 very much branched and dendroid when present ; gleba fleshy, 

 fertile to the base, lacunose, light-colored; cavities subequal 

 to labyrinthif orm ; septa not scissile, composed of branched, 

 interwoven, hyaline hyphae; basidia hyaline, cylindrical to 

 clavate, mostly 2-spored; spores hyaline, globose, echinulate 

 to verrucose. 



This genus is similar to Gautieria in that it has no persist- 

 ent peridium, but is markedly different from Gautieria in 

 the spore characters. Gymnomyces has close affinities with 

 some species of Hydnangium and Octaviania, having very 

 thin peridia, but the spores are hyaline. 



1. Gymnomyces Gardneri Zeller & Dodge, sp. nov. 



Fructificationes subglobosae vel irregulares, plerumque superne in- 

 ferneque complanatae, 2.5x1.5x1.5 cm. diametro servatae, 1.4 X 

 0.8x0.8 cm. siccatae, "cream-color" vel "yellow ocher" (Ridgway) 

 servatae, "tawny olive" (Ridgway) siccatae; peridium nullum; 

 stipes non visus; columella septa crassissima simulans, dendroidea, 

 glebam quasi in gregibus locellorum indistinctis dividens, hyphis 

 gelatinosis hyalinis composita, "russet brown" (Ridgway) siccata; 

 gleba "cream-color" vel "clay-color" (Ridgway) siccata, ad basim 

 sporifera; locelli parvi, circa 0.5 mm. diametro servati, globosi vel 

 irregulares ; septa hyalina, non scissilia, 60-80 /i crassitudine ; basidia 

 hyalina, clavata, duobus cum sterigmatibus, 25-29x9-10 u; sterig- 

 mata tenua, 6-7 p longa; sporae globosae vel oblongae, hyalinae, 

 6-9.6x10-13 n, verrucosae (reticulato-rugosae cum maxime mag- 



nificatae sint). 



Habitat in terra sub foliis Quercus agnfoliae. California. Decem- 

 bri. 



Type : in Univ. Cal. Herb, and in Zeller Herb. 



