182 



Mycologia 



confluent, averaging about i mm. in diameter; perithecia bright 

 red becoming dull red with age, subglobose, smooth, or minutely 

 roughened, partially collapsing when dry, 100-125 mic. in di- 

 ameter ; asci clavate or cylindrical, 8-spored ; spores 2-seriate or 

 irregularly crowded, allantoid, 4-5 X 1 mic. 



On dead leaves of Yucca sp. 



Type locality: Hermosa, Colorado. 



Distribution : Known only from type locality. 



Specimens examined: Colorado, Baker (type). 



This species scarcely differs from Roumeguere's Fungi Sel. 

 Exsicc, 6860 and Saccardo's Mycotheca Ital. 866 so far as we can 

 see, both of which are labeled Nectriella miltina (Mont.) Sacc. 

 The species however is probably distinct from that species, in 

 which the spores are described as ovoid. 



15. Sphaerodermatella gen. nov. 



Stroma erumpent, fleshy; perithecia in dense cespitose clusters 

 seated on the stroma which is entirely obscured at maturity, more 

 or less rough and furfuraceous ; asci broad-clavate to ovoid, 4-8- 

 spored ; spores simple becoming dark colored and opaque. 



Distinguished from Sphaeroderma by the absence of effuse 

 stroma and the cespitose arrangement of the perithecia. 



1. Sphaerodermatella Helleri (Earle) 

 Melanospora (?) Helleri Earle, Muhlenbergia 1: 13. 1901. 

 Sphaeroderma Helleri Sacc. & Sacc. Syll. Fung. 17: 781. 1905. 



Stroma erumpent ; perithecia superficial, densely cespitose, 3 or 

 4-20 on an indistinct basal stroma, large, .5-1 mm. in diameter, 

 deeply collapsing, grayish externally from irregular, flat, finally 

 deciduous, wart-like projections apparently formed by the crack- 

 ing of the hard outer layer ; substance of the perithecial wall of 

 a dark brown color, soft, composed of small-celled parenchyma; 

 ostiolum slightly prominent when young, perforation obscure 

 when collapsed; asci oblong, about 100X30 mic, soon evanes- 

 cent; 4-8-spored; spores 2-seriate, elliptical, simple, at first 

 hyaline, finally opaque and black, surrounded with a more or less 

 distinct hyaline coating about 25-28 X 12-20 mic; expelled and 

 blackening the matrix when mature ; paraphyses indistinct. 



On bark of tree. 



Type locality: Porto Rico. 



Distribution : Known only from type locality. 



Specimens examined: Porto Rico, Heller (type). 



