56 British Uredinece and UstilaginecE. 



arvensis, and P. coronata upon RJiavinns frangula.^ In the 

 following year, 1866, Oersted showed that Gyimiosporaiigiiun 

 sabiiicB and juniperinwn were similarly connected Avith 

 Rccstelia cancellata and coriiuta ; and in 1867, that G. cla- 

 varicsforme was connected with R. lacerata. In 1869, 

 Fuckel indicated the connection of Uromyces jnnci with 

 j^c. zonale. In 1873, Magnus worked out the life-history 

 of/*, caricis in its relationship to ^c. urticcs ; and Schroter, 

 in the same year, the heteroecism of ^c. riumnculi biUbosi 

 and Uromyces dactylidis. Since this time these facts have 

 been repeatedly verified by numerous workers, and our 

 knowledge of the subject has continuously increased, as 

 the subjoined tabular statement will show. 



' De Bary, " Neue Untersuch. iiber Uredineen," 2nd paper (1886), pp 

 208 — 214, 



