THE FUNGI WHICH CAUSE PLANT DISEASE 



635 



Stilbella Lindau (p. 633) 



Hyphae forming a coremium which is capitate above; conidio- 

 phores borne on the cap; conidia small, often enclosed in shme. 



Over one hvmdred species chiefly saprophytes. (Commonly 

 known as Stilbum but the type of the genus being a hymenomycete 

 it was renamed.) 



S. flavida (Cke.) Kohl, causes a serious coffee disease. 



S. these Bern, is on tea in India. 



S. nanum Mas. causes the thread blight of tea. 



S. populi on poplar =Mycosphaerella populi. See p. 250. 



Rhombostilbella Zimmermann (p. 634) 



Synnemata verticillate-stilbiform; conidia rhomboid to biconic, 

 acute, without mucus. Monotypic. 



R. rosae Zimm. is found on Liberian coffee.'^' 



Coremium Link (p. 634) 



Coremium cylindric, apically enlarged and 

 fertile; conidia very small, catenulate. A 

 small genus. In part =Rosellinia and Penicil- 

 lium. See p. 230. 



Isaria Persoon (p. 634) 



Stromata erect, clavate or branched, fer- 

 tile throughout, hairy; conidia small, globose 

 to ellipsoid, hyaline. 



Over one hundred species, chiefly entomog- 

 enous. 



I. fucifonnis Berk, is reported from Eng- 

 land and Australia forming its stromata 

 on the inflorescences of Festuca. 



I. graminiperda B. & M. also causes con- 

 siderable injury to grasses in Australia.^ 



Fig. 429. — Coremium 

 glaucum. Aftei 

 Corda. 



Phaeostilbeae-Amerosporae (p. 632) 

 Dark conidia continuous, globose to elongate. 



