480 THE FUNGI WHICH CAUSE PLANT DISEASE 



The Sphserioidacese (p. 479) 



Pycnidia globose, ovate, or clavate, leathery to carbonous, 

 black or dark brown, opening by a pore, superficial, erumpent or 

 covered; stroma present or absent; conidia variable in form, 

 color, and division. 



The family is subdivided according to its spores as indicated 

 below. 



Key to Sections of Sphsrioidaces 



Conidia globose to elongate, straight or 

 falcate, 1 to many-celled 

 Conidia 1-celled, globose, ovate or elon- 

 gate I. Amerosporse. 



Conidia hyaline 1. Hyalosporse, p. 480. 



Conidia colored 2. Phseospors, p. 500. 



Conidia 2-celled, ovate to elongate. ... II. Didymospors. 



Conidia hyaline 3. Hyalodidymse, p. 505. 



Conidia colored 4. Phteodidyms, p. 509. 



Conidia 3 to many-celled, by transverse 



septa, elongate III. Phragmospors. 



Conidia hyaline 5. Hyolophragmis, p. 513. 



Conidia colored 6. Phseophragmis, p. 514. 



Conidia muriform, ovate to elongate. . IV. Dictyospore. 



Conidia hyaline 7. Hyalodictys. 



Conidia colored 8. Phaeodictya, p. 516. 



Conidia filiform, 1 to many-celled, hyaline 



or colored V. 9. Scolecosporse, p. 517. 



Conidia cylindric, spirally coiled, 1 to 



many-celled, hyaline or colored VI. 10. Helicospore. 



Conidia stellate, 1 to many-celled, hyaline 



colored VII. 11. StaurospoTS. 



Sphserioidacese-Hyalosporae 



Spores hyaline, 1-celled, spherical, elliptical or long. 



Key to Genera of Sphsrioidacese-Hyalospors 

 Stroma none; pycnidia separate. 

 Pycnidia smooth 

 Conidia borne singly 



