63 



P. Nielsen mentions it (74 a ^°^) as an enemy which has not yet made 

 its way into this country. It was first found in this country on wild 

 Beta in the Isle of Sams0 and on cultivated Beta near Roskilde 1888 

 (R89j^^«). 



Beta maritima. Sams0 Koldby Kaas (Exc. 26/7 87); Lang. Bagenkop (C. H. O.); 

 S. Refsnss & Saltbsk (Exc. i6-i7/e oo see E. W. 06), Landbohajskolens Have. 

 Beta vulgaris rapifera. S. Redevejimallegaard (^/io 88 Helweg), Tranderups 

 gaard (Chr. Jespersen), Tystofte (P. N.); L. Nakskov (F. K. R.), common in 

 the seed growing parts of the country. 



57. Peronospora ficariae Jul., Syll. VII ''^\ Fisch. IV "\ Ranunkel- 

 skimmel (R 04 a '^). 



The mycelium of the fungus penetrates the whole of the host-plant; 

 it is common early in the spring (March— April) and will never be 

 looked for in vain in stocks of Ranunculus ficaria, repens etc. 



Ranunculus lingua. J. Skive!. Ranunculus flammula. J. St. Vildmose, Klit- 

 meller. Ranunculus acer. F. Skaarup; B. Hammershus. Ranunculus lanuginosus. 

 J. Boiler. Ranunculus repens. J. Skive! F. Braendeskov, Skaarup (May 74) and 

 many other places. Ranunculus bulbosus. S. Vasebskgaard (M. L. M.). Ranun- 

 culus ficaria common. Myosurus minimus (Per. myosuri Fuck.). J. Viborg!. 



58. Peronospora pulveracea Fuck., Syll. VII ^^\ Fisch. IV '"^ 

 Nyserodskimmel (R 02 a '"" 6. 04 a ''). 



It is much like the preceding one in its manner of development; 

 the leaves of the affected plants grow small and scrubby, the whole 

 of their under-side covered by the conidiophora of the fungus, they 

 are unable to blossom. It is not rare in nurseries and causes much 

 damage there. (R 02 m S.. 03 g). May be found from May to Sep- 

 tember. 



Helleborus viridis. J. Viborg ! , Aarhus (}h 94 Weber see R 96 m ''26), Byg- 

 holm (Chr. Jensen), Fredericia. 



59. Peronospora arborescens (Berk.) de By., Syll. VII "\ Fisch. 

 IV", Valmueskimmel (R 02 a =" 6. 04 a '^). 



April— October. 



Papaver somniferum, S. Landsgrav (H. Knudsen). Papaver rhoeas. F. Ringe ! , 

 Nyborg; S. Skelsker (Exc. ^^Ib 07). Papaver dubium &. argemone very common. 



60. Peronospora affinis Rossm., Syll. VII ''^\ Fisch. IV^^, Jord- 

 regskimmel (R 04 a ^=). 



The mycelium of the fungus penetrates the whole of the host-plant 

 or parts of it. The affected plants are lower in growth, more ramified, 

 and have a tendency towards forming witches-brooms (R 85 a). 



June— September. 



Fumaria officinalis. J. Viborg!; F. Skaarup; S. Lyngby, 0resundsh0j, Char- 

 lottenlund (O. R.), 0rsl0v (June 75 P. N.); L. Stensgaard (O. R.). 



