ASCOMYCETES 257 



mass of mycelium which arises beneath the epidermis. It is 

 broadly elliptical, with a rather thick wall and no indication of a 

 beak (Fig. 112, a). The conidiophores are short and simple, bear- 

 ing spores — ovate or elliptical — measuring ordinarily 8-10 x 7- 

 Sfi. In moist weather the spores are pushed out in vermiform 



Fig. iii. Phyllosticta Stage of the Black Rot Fungus 

 (Photograph by H. H. Whetzel) 



masses and upon dissemination they are capable of immediate 

 germination. Accompanying these pycnidia (the spores of which 

 are frequently known as stylospores) there may be found some- 

 what smaller, more nearly spherical pycnidia (commonly but un- 

 fortunately known as spermagonia). The latter contain relatively 

 long filiform conidiophores converging towards the center, and 



