72 



Mycologia 



forate; perithecial wall composed of large cells, 12-15 m i c - m 

 diameter ; perithecia 200-225 X 250-275 mic. ; asci nearly cylin- 

 drical, 8-spored, 85-90 X 12-15 mic; spores i-seriate or often 

 irregularly crowded, globose or subglobose, at first hyaline and 

 surrounded with a transparent exospore, becoming brown, with 

 several large oil-drops within, at maturity outer surface becoming 

 wrinkled and rough, mostly 10 Xio mic. in diameter; paraphyses 

 present, inconspicuous, simple, septate. 



Parasitic on cotton and okra, Gossypium herbaceum, G. Bar- 

 badense and Hibiscus esculentus. 



Type locality: Alabama. 



Distribution : S. Carolina to Virginia and Arkansas. 



Exsiccati : Ellis & Everhart's Fungi Columbiana 1434. Other 

 specimens examined: Alabama, Earle (for perithecial characters). 



Neocosmospora vasinfecta tracheiphila Smith, 1. c. 

 Nectriella tracheiphila Smith, Proc. A. A. A. Sci. 44: 190. 



1895 (hyponym). 



Perithecia as above, spores mostly 12 X 12 mic. Parasitic on 

 cowpea, Vigna sinensis. 



Neocosmospora vasinfecta nivea Smith, 1. c. 

 Fusarium niveum Smith, Proc. Am. Ass. Adv. Sci. 43 : 289. 



1894 (hyponym). 



Perithecia as above ; spores globose or elliptical, wrinkled or 

 smooth generally smaller than in the preceding and more often 

 elliptical. Parasitic on watermelon. 



10. Melanospora Corda, Ic. Fung. 1 : 24. 1837. 



Perithecia superficial, without stroma, globose-pyriform, with 

 a long neck, usually clothed at the tip with a fringe of hairs and 

 perithecia often hairy; asci broad-clavate, 4-8-spored; spores 

 simple, colored, brown or brownish-black. 



Type species : Melanospora Zamiae Corda. 



The genus Melanospora is distinguished from Ceratostoma 

 mainly by the lighter color and less decidedly carbonaceous peri- 

 thecia. The two genera grade so closely into each other that 

 it becomes difficult to draw a fast line between them although 

 some of the species show undoubted relationship with the 

 Hypocreales. 



Of the three species recorded for North America one un- 

 doubtedly belongs to this genus while the other two are here 

 included doubtfully. 



