THE FUNGI WHICH CAUSE PLANT DISEASE 537 



Pycnidia mostly cupulate, not lacerate; 



conidia hamate 3. Oncospora. 



Pycnidia in a stroma 



Pycnidia pezizoid 4. Ephelis, p. 537. 



Pycnidia superficial 5. Pseudocenangium. 



Ephelis Fries 



Stroma black, subeffused, sclerotioid; pycnidia pezizoid, sunkea 

 in the stroma; conidia cylindric to filiform. 



Some seven species, chiefly of no economic importance. 

 It is a conidial form of Balansia. See p. 209. 



Melanconiales (p. 479) 



Mycelium internal; true pycnidia never developed, the conidio- 

 phores form a stratum; strata typically bearing conidia in acervuli 

 which are immersed or erumpent, black or light colored, waxy, 

 corneous or even submembranous, accompanied by setae or not; 

 conidia variable. 



The common name " anthracnose" is applied to any disease 

 caused by a member of this order. 



A single family Melanconiacese which contains about forty-five 

 genera and over twelve hundred species. 



Key to Sections of Melanconiaces 



Conidia globose to elongate 

 Conidia continuous 



Hyaline I. Hyalosporae, p. 538. 



Colored II. PhsBOsporae, p. 553. 



Conidia l-eeptate 



Hyaline III. Hyalodidsrmse, p. 555. 



Colored IV. Phseodidyma, p. 556. 



Conidia 2 to many septate 



Hyaline V. Hyalophragmiae, p. 556. 



Colored VI. Phseophragmise, p. 557. 



Conidia muriform, dark • VII. Phseodictyae. 



Conidia long-cylindric to filiform VIII. Scolecospora, p. 561. 



Conidia stellate IX. Staurosporse. 



