66 



Is considered by A. Fischer (IV "") to be identical with Per. poten- 

 tillae de By. 



Rubus fiuticosus. S. Fredensborg (Vs 94 a ^°l8 95 see R 96 m ^^e). 



70. Peronospora potentillae de By., Syll. VII "^ Fisch. IV "\ 

 Potentilskimmel (R 04 a '^). 



May— October, rare. 



Potentilla reptans. S. Slagelse!. Geum urbanum. J. Knivholt Skov!. Alchi- 

 milla vulgaris (= Peronospora akhimillae Otth. Syll. XIV ^^^, is most fre- 

 quently found in company with Uromyces akhimillae. Jonstrup, Charlotten- 

 lund (Oct. 88 Joh. Lange, again ^s/s HI). Alchimilla alpestris. S. Jaegersborg ! . 

 Agrimonia eupatoria. S. Snedinge (74) a 0rsl0v (P. N.). 



71. Peronospora viciae (Berk.) de By., Syll. VIP''^, Fisch. IV", 

 Vikkens Bladskimmel (R 93 c ^«), Vikkeskimmel (R 02 a ^"^ c. icon & 

 04a^', Lind &. Ravn 10"). 



May— August. 



Ornithopus perpusillus. J. Flynderse!; F. Knarreborg; Thorseng Bregninge. 

 Vicia hirsuta. F. Holmdrup; S. Fredensborg, Espe (F. K. R.). Ficia tetrasperma. 

 L. Sundby, Christianssaede Skov. Vicia cracca. J. Skive!; L. Lidsa. Vicia vil- 

 losa. S. Lyngby (M. L. M.), Nsstved (F. K. R.) etc. Vicia sepium. J. Krabbes- 

 holm Skov!; F. Vejstrup Aaskov. Vicia sativa. F. Vejstrup Aaskov; L. Vester- 

 borg. Vicia angustifolia. J. Skive!, Viborg!. Vicia lathyroid.es. J. Skive!. Pisum 

 sativum. Common in the gardens. J. F. (Skaarup ''^/e 71), S. L. etc. Pisum 

 arvense. J. Tylstrup ! . Lafhyrus pratensis. F. Klingstrup. Lathyrus Silvester. J. 

 Horsens ! , F. Vejstrup Aaskov, Trolleborg; S. Vejenbred (R. Fejlberg); L. Grian- 

 negade. Orobus tuberosus. J. Viborg ! ; S. Brede. Orobus niger. F. Svenborg. 



72. Peronospora trifoliorum de By., Syll. VII "^ Fisch. IV "", 

 Kleverens Bladskimmel (R 93 c " c. icon). Kleverskimmel (R 02 a =»= 



c. icon & 04 a i'). 



Rostrup has ob- 

 served that the dis- 

 ease attacks plants, 

 grown from seeds 

 of foreign origin 

 (America) more 

 than plants from ho- 

 me-cultured seeds, 

 particularly as far 

 as concerns Medi- 

 cago sativa (R 86 

 d'"a 94 e). Ro- 

 p. 2 strup has found 



a. Leaf of Medicago sativa with Peronospora trifoliorum. b, coni- oospores in its 

 diophorewith conidia. c, a single conidium ^. d, oospore^. hollow rhizome. 



