636 THE FUNGI WHICH CAUSE PLANT DISEASE 



gradually disappearing above, immersed, erumpent, depressed- 

 globose, gregarious or scattered, 50-100 /x, sometimes collapsing 

 rupturing irregularly by a slit or triangular split; conidia cylindric, 

 straight, 17-19 x 3-4 n; conidiophores simple, oblong to subglobose, 

 about }^ ihe length of the spore, or less. On cranberry. 

 S. pulvinatum Sh. is also on cranberry. 



Ezcipulacese-Hyalodidyms (p. 533) 

 Conidia hyaline, 1-septate, oblong or fusoid. 



Key to Genera of Ezcipulaces-Hyalodidyms 



Pycnidia discoid or patellate 

 Pycnidia discoid, veiled; conidiophores 



simple 1. Discella, p. 536. 



Pycnidia patellate, subsuperficial; conid- 

 iophores branched 2. Pseudopatella. 



Pycnidia hysterioid or irregularly gaping 



Pycnidia hysterioid, elongate 3. Scaphidium. 



Pycnidia globose, then irregularly gaping; 



conidia catenulate 4. Siropatella. 



Discella Berkley & Broome 



Pycnidia disco-patellate, imperfectly formed; conidia fusoid 

 or oblong. Some twelve or fifteen species, chiefly saprophytes. 



D. cacaoicola A. & S. is on cacao in Africa. 



The Excipulacese-hyalophragmis, Excipulaceae-phseophragmue 

 contain no important parasites. 



Excipiilaceae-Scolecosporae (p. 533) 



Conidia typically hyaline, bacillar or filiform, continuous or 

 septate. 



Key to Geneea op Ezcipulaces-Scolecosporae 

 Pycnidia separate 



Conidia separating at the joints 1. Schizothyrella. 



Conidia not separating 

 Pycnidia discoid, covered, erumpent, 



margin lacerate; conidia filiform. . 2. Protostegia. 



