

JJ 



J> 



EXPLANATION OF PLATES. 251 



Plate tig. 



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 

 Euphorbice) . 



„ 194. Winter spores of Melampsora Euphorbia x highly. 



195. Portion of Poplar-leaf with Poplar wedge-rust (Me- 

 lampsora populina) . 



196. Winter spores of Melampsora populina x 460. 

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

 mination — a sporidia x 466 (Tulasyie). 



X. 198. Fruit of Shepherd's Purse with White rust (Cystopus 

 candidus). 



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

 didus). 



„ 200. Conidia of White rust (Cystopus candidus) x 360. 



„ 201. Portion of Goatsbeard-leaf with White rust (Cystopus 

 cubicus). 



„ 202. Conidia of Goatsbeard white rust (Cystopus cubicus) 

 x360. 



„ 203. Portion of Mycelium 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) 

 *4O0 (DeBary). 



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



x400. 

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



(De Bary). 



209. Resting zoospores in germination * 400 (Be Bary). 



210. Oogonium of Goatsbeard white rust (Cystopus cubicus) 

 x400 (DeBary). 



211. Oogonium of Sandwort mould (Peronospora arenaria) 

 x400 (DeBary). 



„ 212. Oogonium of Pea mould (Peronospora vicia) x 400 (De 



Bary). 

 „ 213. Oogonium of Veronica mould (Peronospora grisea) 



x400 (DeBary). 

 „ 214. Oogonium of Spinach mould (Peronospora effusa) x 400 



(De Bary) . 

 ,, 215. Leaf of Goosefoot with mould (Peronospora effusa). 



XI. 216. Conceptacle of Hop mildew (Spk&rotheca castagne\i 

 x80. 



217. Conceptacle of Rose blight (Spharotheca pannosa) x 80. 



218. Sporangium of Spheerotheca pannosa x highly. 



» 



» 

 »» 



» 





