Ervsiphe 215 



E. tortilis is confined to Europe. Burrill [66) records the present 

 species as occurring in the United States, remarking as follows : 

 '' 0\\ Cormis sanguinca, Missouri (Tracy and Galloway). This is 

 here included solely upon the authority given, and apparently upon 

 one collection. In Europe the fungus is common on the same 

 host, and as this is abundant in cultivation with us, it is altogether 

 probable that this parasite may be frequently found/' 



It may be noticed that certain forms of E. polygoni (especially 

 those on Clcviafis) are very similar to E. tortilis when examined 

 under the microscope with the appendages flattened horizontally 

 by the pressure of a cover-glass; when examined in situ on the 

 leaf, however, it is seen that in E, tortilis the appendages are as- 

 surgent, altogether free from the surface of the leaf, and fascicu- 

 lately wound together, while those of the form of E. polygoni in 

 question spread horizontally on the leaf 



E, tortilis is sometimes recorded on Cornus Mas, but all the 

 specimens so named that I have seen have proved to be Phyllac- 

 tinia corylea. The record by Bagnis (i8) of the occurrence of the 

 present species on Bcllis annua requires confirmation. 



It is possible that the earliest specific name for this species 

 is corni, given by Wallroth in the Ann. Wett Ges., in 1819. 

 The name tortilis, given by the same author in the Verhandl. 

 Berl. Gesell. Nat. Freund., dates from the same year, and there 

 appears to be no evidence as to which work appeared first. Un- 

 der these circumstances, I have used the name tortilis, as being 



the one in general use, and as that retained by Wallroth himself 

 in his later work. Flora Crypt. Germaniae. 



6. E. TAURiCA Lev, [Figs. 145-150, 152-154] 



ErysipJic co)npositannn Duby, Bot. Gall. 2: 870 (partim). 

 1830. 



E, taurica Lev. Demidofi's Voy. Russ. merid. (bot.) 1 19. //. 6. 

 / 5, 1S42 ; Dur. & Mont. Fl. d'Algen (Crypt.) 566, 1846-9; 

 Lev. Ann. sci, nat. III. 15 : \6\. pL 10. f, jo. 185 1 ; Sacc. SylL 

 Fung. I : 16. 1882. 



Erysibc dcpressa Rabenh, Deutschl. Krypt. Fl. I. 232 (par- 

 tim). 1844. 



/ 



1845. 



