252 



THE ASCOMYCETES 



Fig. 100. CoccojJiyces hiemalis, the cause of cherry shot-hole. A. Conid- 

 ium of the Cylindrosporium stage, which on germination formed spermatia. 

 B. Branched spermatiophore from conidial acervulus. C. Basal portion of 

 coiled archicarp from interior of stroma, at exterior of which spermatia 

 and conidia are being produced. D. Semidiagrammatic representation of a 

 portion of stroma, showing spermatia adhering in great numbers to the 

 trichogvne that protrudes well above the surface of the young apothecial 

 stroma. E. Host cell with intercellular hypha and bulbous haustoria. F. 

 Mature ascospores. G. Ascus and branched paraphysis. H. Segment of 

 acervulus, showing conidia and conidiophores. At times conidia are borne 

 among the asci within the apothecium. {A, B, C, and D adapted from 

 Backus, E, F, G, and H adapted from Higgins.) 



