180 



Some species of Dothiora produce conidial fructification of the type 

 of Sphaeronema. Moreover Phyllachora and Scirrhia possess a third 

 form of fructification called Hadrotrichum. Cultivating experiments 

 have only been made with one species (Dothidella noxia). As to all 

 other species we can only base our knowledge on suppositions and 

 on the gradual appearance of the different stages on the same host. 

 The numerous analogical cases, however, support the probability of 

 our suppositions. 



Scirrhia rimosa 

 Phyllachora graminis 



— poae 



— cynodontis 



— junci 

 Diachora onobrychidis 



Mazzantia galii 



— sepium 

 Dothidella thoracella 



— stellariae 



— ambiens 



— ulmi 



— betulina 



— noxia 

 Dothiora salicis 



— sphaeroides - 



— pyrenophora - 



— mutila 



— rhamni 



— xylostei 

 Dothidea ribesia 



• Placosphaeria dothideoides — Hadrotrichum 



phragmitis. 



— graminis — Hadrotrichum 



virescens. 



— Hadrotrichum 



viresc.var. poae. 



— cynodontis. 



— junci. 



— onobrychidis (see Muller 93 



c. icon.). 



— galii (see Wt. II "3). 



— sepium (see Syll. II °°^). 



— sedi. 



— stellariae (see Lind 05). 



— cerastii. 



- Piggotia astroidea (see Wt. IP"" & Baumler). 



- Gloeosporium betulae. 



- Fusicoccum noxium (see Ruhland 04). 



• Rabenhorstia salicis (see Vleugel 08 b ^^^). 

 Sphaeronema Fuckelianum (sec. Fuckel). 

 6. Dothiorella populina (sec. Karst.). 



• Sphaeronema sorbi. 



— microscopica. 



— rhamni. 



— lonicerae (sec. Fuckel). 



- Rabenhorsia ribesia (see All. VI °^''). 



Dothideaceae. 



Dothidea. 



697. Dothidea virgultorum (Fries) Fuckel, Wt. IP", Syn: Sphae- 

 ria virg. Fries S. M. II ^", Plowrightia virg. Sacc, Syll. II ^^\ 

 On living twigs of Betula pubescens S. Holte (^"/a 08 Boas). 



