CHAPTER III 



PERONOSPORA EXIGUA, W.SM. 



ANOTHER Peronospora, with the habit of P. grisea, Ung., 

 a parasite of Veronica, is very frequent upon clovers in 

 Britain, is equally destructive with P. trifoliorum, 



FIG. 2. CLOVER MILDEW. 



Peronospora emgua, W.Sm. 



Enlarged 400 diameters. Spore enlarged 1000 diameters. 



D.By., and is a minute and hitherto undescribed species. 

 This plant, Peronospora exigua, W.Sm. (exiguus, small), is 

 illustrated, enlarged 400 diameters at A, Fig. 2 and a 



