MYCOSPHAERELLACEAE 



211 



accomplished. If the leaves are occasionally moistened while 

 they are maintained indoors, however, perithecia will develop. 



An ever-increasing body of evidence is available ^hich indi- 

 cates that spermatia are commonly produced in iMycosphaerella. 

 Some of the species known to possess spermatia are listed in 

 Table 1, and spermatia have been observed in a number of others 

 whose life histories are being elucidated. 



TABLE 1 



Species of Mycosphaerella Known to Possess Spermatia 



Organism Host Observer 



Mycosphaerella Primus cerasus, Higgins (1914) 

 nigerristigma '' P. pennsyhanica 



Klebahn (1918) 



Klebahn (1918)" 



Mycosphaerella Hier actum 

 hieracii boreale 



Mycosphaerella Tilia cordata 

 punctijormis f. 

 tiliae 



Mycosphaerella Aesculus hippo- Klebahn (1918) 

 hippocastani castanum 



Mycosphaerella Ficus carica Higgins (1920) 



bolleana 



Mycosphaerella 

 lythr ace arum 



Mycosphaerella 

 personata 



Punica grana- 

 tum 



Vitis spp. 



Wolf (1927) 



Higgins (1929) 



Mycosphaerella Prunus cerasus Jenkins (1930) 

 cerasella 



Remarks 



Spermogonia pycnidia- 

 like and associated in 

 late summer with the 

 Septoria stage, often in 

 same pycnidia. 



Micropycnidia associ- 

 ated with the Ramu- 

 laria stage. 



Bacteria-like conidia pro- 

 duced in old stromata 

 of the Cercospora stage 

 or in separate pycnidia 

 of Phyllosticta type. 



Called microconidia. Oc- 

 cur interspersed with 

 Septoria stages, and 

 also produced in pure 

 culture. 



Associated with Cercos- 

 pora bolleana at close 

 of season. Spermo- 

 gonia pycnidia-like. 



Associated late in season 

 with Cercospora lythra- 

 cearum. 



Associated with Cercos- 

 pora viticola during au- 

 tumn. Spermogonia 

 are pycnidia-like. 



Spermogonia are pyc- 

 nidia-like and occur 

 late, associated with 

 the Cercospora stage 

 in bases of conidial 

 stromata. 



