THE FUNGI WHICH CAUSE PLANT DISEASE 205 



N. vandae Wah. and N. goroshankiniana (Wah.) grow on cul- 

 tivated Vanda: N. theobromae Mass., probably identical with 

 N. striatospora Zimm., is found on cacao trunks as is also N. jun- 

 geri Henn. 



N. bulbicola. Henn. is on orchids and N. gigantispora Zimm. on 

 Ficus. 



Dialonectria (p. 201) 



N. graminicola B. & B., the conidial stage of which is Fusarium 

 nivale is destructive to winter wheat and rye 

 in Europe.^'^ 



Less known are N. bogoriensis Bern and 

 N. ranillse Zimm. on vanilla; N. luteopilosa 

 Zimm. and N. fruticola Zimm. on coffee; ^^ 

 N. theobromicola Mass. on Theobroma. 



Neocosmospora E. F. Smith was reported by 

 Smith ^^^ as the ascigerous form of Fusarium fiq. i46.— n. ipo- 

 vasinfectmn and consequently as the cause of ™"^' *° . ^sp."^- 



0, c, a, germination 



many serious wilt diseases. Recent work by of ascospores. Af- 

 Higgins ^'^' ^'* and by Butler ^'^ has shown 

 that in all probability there is no genetic connection between 

 these forms and that the fungus under discussion is merely a 

 harmless saprophyte. 



Calonectria (p. 198) 



Perithecia free, often closely gregarious, true stroma wanting 

 but perithecia often surrounded by a radiate, white mycelium 

 which may simulate a stroma; perithecia globose to ovate, red 

 or yellow; asci elongate, 8-spored; spores elongate, more than 

 2-celled. About sixty species. 



C. pyrochroa (Desm.) Sacc, has been reported parasitic on 

 Platanus." Its conidial stage is Fusarium platani. 



C. flavida Mass. is in the West Indies on cacao causing 

 canker. 



C. cremea Zimm. with Spicaria colorans, Corymbomyces albus, 



