212 



THE ASCOMYCETES 



TABLE 1 (Confinuecf) 

 Species of Mvcosphaerella Known to Possess Spermatia 



Organism 



Mycosphaerella 

 areola 



Mycosphaerella 

 cruenta 



Mycosphaerella 

 berkeleyi 



Mycosphaerella 



arachidicola 

 Mycosphaerella 



confusa 

 Mycosphaerella 



arachnoidea 

 Mycosphaerella 



per sic ae 

 Mycosphaerella 



Jraxinicola 



Mycosphaerella 

 cercidicola 



Mycosphaerella 

 nyssaecola 



Mycosphaerella 

 effigurata 



Mycosphaerella 

 polymorpha 



Host 

 Gossypium spp. 



Observer 



Ehrlich and Wolf 

 (1932) 



Vigna sinensis Latham (1934) 



Arachis hypo- 

 gaea 



Arachis hypo- 



gaea 

 Rubus spp. 



Morus rubra 



Prunus persica 



Fraxinus spp. 



Cercis canaden- 

 sis 

 Nyssa spp. 



Fraxinus spp. 



Jenkins (1935) 



Plat anus occi- 

 d en talis 



Jenkins (1935) 



Wolf (1935) 



W^olf (1936) 



Higgins and Wolf 



(1937) 

 W^olf (1939) 



Wolf (1940, 1940a) 

 Wolf (1940, 1940a) 



Wolf and David- 

 son (1941) 



Smith and Smith 

 (1941) 



Remarks 



Associated with Ramu- 

 laria areola. Spermatia 

 also developed in cul- 

 ture. 



Associated with Cerco- 

 spora cruenta at bases 

 of old conidial stro- 

 mata. 



Pycnidia-like spermogo- 

 nia formed during au- 

 tumn on lesions formed 

 by Cercospora stage. 

 Quite as the previous 

 species. 



Associated with Cerco- 

 spora rubi. 



Associated with Cerco- 

 spora arachnoidea. 



Associated with Cerco- 

 spora persica. 



Spermogonial stage had 

 been identified as Phyl- 

 losticta viridis. 



Associated with Cerco- 

 spora cercidicola. 



Spermogonial stage has 

 been called Phyllosticta 

 nyssae. 



Associated with Mars- 

 sonia Jraxini. Sper- 

 mogonial stage identi- 

 fied as Piggotia Jraxini. 



Associated with Stigmina 

 polymorpha. 



The details of spermatial formation in this genus were first 

 recorded by Higgins (1920). He found that the uninucleate 

 spermatium mother cells, occurring in chains, become quadrinu- 

 cleate; the protoplast then separates into four units but without 

 wall formation. These units then migrate one at a time into a 

 sterigma and are abstricted from its tip. After the mother cell 

 is empty, its wall dissolves to become part of the mucoid matrix 



