

55 



3> 



J3 



EXPLANATION OP PLATES. 251 



Plate flff. 



IX. 191. Portion of Sallow leaf with Willow wedge-rust (Me- 

 lampsora salicina). 



192. Winter spores of Melampsora salicina x 460. 



193. Leaves of Spurge with Spurge wedge-rust {Melampsora 

 EuphorbiiB). 



194. Winter spores of Melampsora Euphorbice x highly. 



195. Portion of Poplar-leaf with Poplar wedge-rust (J/>- 

 lampsora populind) . 



196. Winter spores of Melampsora populina x 460. 

 „ 197. Winter spores of Melampsora betulina in active ger- 

 mination — a sporidia x 466 {Tulasne). 



X. 198. Pruit of Shepherd's Purse with White rust {Oystopus 

 ca)ididus). 



„ 199. Portion of Cabbage-leaf with White rust {Cystopus can- 

 didus). 



200. Conidia of White rust {Cystopus caiididus) x 360. 



201. Portion of Goatsbeard-leaf with White rust {Cystopus 

 cubicus). 



202. Conidia of Goatsbeard white rust {Cystopus, cubicus) 

 x360. 



203. Portion of MyceHum producing the first of a chain of 

 conidia x 400. 



204. Mycelium of White rust with sucker-like processes 

 x360. 



205. Mycelium of White rust with nascent oogonia x 360. 



206. Oogonium of Crucifer white rust {Cystopus candidus) 

 x4Q0 {Be Bary). 



207. The same, further advanced, ruptured, with zoospores, 

 X 400. 



208. Pree zoospores of White rust, with their cilise, x 400 

 {De Bary). 



209. Resting zoospores in germination x 400 {De Bary). 



210. Oogonium of Goatsbeard white rust {Cystopus cubicus) 

 x4^00 {Be Bary). 



211. Oogonium of Sandwort mould {Peronospora arenarice) 

 xm) {Be Bary). 



212. Oogonium of Pea mould {Peronospora vicice) x 400 {Be 

 Bary). 



213. Oogonium of Veronica mould {Peronospora grisea) 

 x'iOO {Be Bary). 



„ 214. Oogonium of Spinach mould {Peronospora effusd) x 400 



{Be Bary). 

 . „ 215. Leaf of Goosefoot with mould {Peronospora effusa). 



XI. 216. Conceptacle of Hop mildew {Spkierotheca castagne)i 

 xSO. 



„ 217. Conceptacle of Rose blight {Spharotheca pannosa) x 80» 

 „ 218. Sporangium of Spharotheca pannosa x highly. 







» 



