Seaver: Hypocreales of North America 71 



This specimen in the Ellis collection and also in the material 

 received from Mr. Morgan, which is a part of the type collection, 

 is labeled Ophionectria cerea (Berk. & Curtis) Ellis & Everh., 

 but examination of this material shows it to be entirely different 

 from other specimens of Ophionectria cerea (Berk. & Curtis) 

 Ellis & Everh. in external as well as in microscopic details. Its 

 habitat is also entirely different from that species. 



9 Neocosmospora Smith, U. S. Dept. Agric. Div. Veg. 

 Phys. Path. Bull. 17: 7-59. pi 1-10. 1899 



Perithecia as in Nectria (bright red in the known species) ; asci 

 numerous; ascospores in one row, brown, globose or short-ellip- 

 tical, continuous, with a distinct, wrinkled exospore (the latter 

 sometimes wanting in smaller spores) ; paraphyses present, in- 

 conspicuous, broad, loosely jointed, unbranched, consisting of 

 about 5 cells. 



Three conidial stages, Cephalosporium, Fusarium and Oidium. 



1. Microconidia (Cephalosporium stage). Spores colorless, 

 oval to narrow-elliptical, straight or slightly curved, simple, 4-25 

 X 2-6 mic, borne singly on the ends of short branches of a 

 mycelium which fills the water ducts and interior parts of the 

 living stems of melon and cowpea, conidia often 1-2-septate in 

 cultures. 



2. Macroconidia (Fusarium stage). Spores lunulate, 3-5-sep- 

 tate, 30-40 X 4-6 mic, borne on the surface of dead stems in 

 immense numbers on innumerable, small, oval or hemispherical 

 conidial beds ; conidiophores compact, irregularly branched, single 

 spores colorless, in mass pink to deep salmon-color. 



3. On the surface of the dead stems of watermelon and in old 

 cultures of the melon fungus on horse dung, globose, thin-walled, 

 smooth, terminal or intercalary bodies are formed, in mass brick- 

 red, individuals 10-12 mic. in diameter, extreme limits, 7-15 mic. 



Type species : Fusarium vasinfectum Atk. 

 The position of this genus is uncertain. 



1. Neocosmospora vasinfecta (Atk.) Smith, U. S. Dept. Agric. 



Div. Veg. Phys. Path. Bull. 17: 7-50. pi. 1-10. 1899 

 Fusarium vasinfectum Atk. Ala. Agric. Exp. Sta. Bull. 41 : 28. 

 1892. 



Perithecia gregarious, often closely crowded, bright red, 

 smooth, with a very prominent, obtuse ostiolum, becoming per- 



