EXPLANATION OF PLATES. 229 



Plate fiff. 



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

 lampsora salicina) . 



192. Winter spores of Melampsora salicina x 4-GO. 



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

 EupJwrhice). 



194. Winter spores of Melampsora Uuphorhla x highly. 



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

 lampsora popiilina) . 



195. Winter spores of Melampsora popidina x 460. 

 197. Winter spores of Melampsora betulina in active ger- 

 mination — a sporidia x 466 {Tulasne). 

 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 

 cuhicus), 



202. Conidia of Goatsbeard white rust (Cystopus cuhicus) 

 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) 

 x^m(DeBary). 



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

 X 400. 



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

 (Be Bar y). 



209. nesting zoospores in germination x 400 (Be Bary). 



210. Oogonium of Goatsbeard white rust (Cystopus cuhicus) 

 x400 (Be Bary). 



211. Oogonium of Sandwort mould (Beronospora arenari(e) 

 x400 (Be Bary). 



212. Oogonium of Pea mould (Beronospora vicice) x 400 (Be 

 Bary) . 



213. Oogonium of Veronica mould (Beronospora grisea) 

 x400 (Be Bary). 



214. Oogonium of Spinach mould (Beronospora effusa) x 400 

 (Be Bary). 



215. Leaf of Goosefoot with mould (Beronospora effusa). 

 XL 216. Conceptaclc of Hop mildew (Sphcerotheca castaynei) 



xSO. 



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



218. Sporangium of Spha'rotkec a pannosa x highly. 



