60 



44. Plasmopara nivea (Unger) Schroeter, Syll. VII ''"', Fisch. W^', 

 Syn: Peronospora nivea Unger, Skaermplanternes Bladskimmel (R 

 93 c ^'), Skaermplanteskimmel (R 02 a '"^ 6. 04 a ^^ Lind 6. Ravn 10 ''). 



Very common; may be found from May to Oct., is much favoured 

 by the naked snails. 



Sanicula europaea. F. Holmdrup. Aegopodium podagraria very common. 

 Apium graveolens common in the gardens, Rostrup (02 a iss) has found Oospores 

 in the tubers. Sium latifolium common. Conium maculatum common. Anthris- 

 cus Silvester &. cerefolium. Angelica silvestris common. Levisticum officinale. F. 

 Skaarup. Pastinaca sativa, Selinam catvifolium. S. Prsster!. Peucedanum palu- 

 dosum J. Saby; F. Kirkeby!, Skaarup; S. Gammelmose (R 06 cc ^se). Daucus 

 carota. J. Dommerby! F. Skaarup. Laserpitium latifolium. S. Jonstrup Vang. 



45. Plasmopara densa (Rabh.) Schroeter, Syll. VII ''', Fisch. W\ 

 Syn: Peronospora densa Rabh., Skjallerskimmel (R 04 a ^'). 



June— August, concerning its fecundation see Ruhland 03. Very 

 common on all the below-mentioned host-plants: 



Odontites simplex, Odontites rubra. L. Stensgaard (Aug. 1871), Euphrasia 

 officinalis, Euphrasia brevipila. J. Astrup (E. W.), Alectorolophus major & minor, 

 Pedicularis palustris. St. Vildmose. 



Bremia. 



46. Bremia lactucae Regel, Syll. VII "", Fisch. W", Syn: Perono- 

 spora lactucae Rostrup (04 a "), Peronospora gangliformis de By., Salats 

 skimmel (R 02 a =™ & 04 a 2^). 



Very common; may be found from May to Octob., most frequently, 

 however, in July. 



I Lappa officinalis. F. Klingstrup; S. Lyngby!. Lappa tomentosa. S. 0rsl0v 

 (P. N.). Lappa glabra. F. Skaarup (^'/s 71). Cirsium arvense. Skaarup, S. Sve- 

 balle ! . Cirsium oleraceum. F. Skaarup. Centaurea jacea. F. Skaarup. Centaurea 

 cyanus. J. Horsens!; F. Skaarup; L. Stensgaard. Artemisia vulgaris. J. Hjer- 

 ring^!. Chrysanthemum segetum. S. Lyngby! (hosp. nov., no parasitic fungus has 

 hitherto been found an this common plant). Senecio vulgaris very common. 

 Lampsana communis. J. Skive!; F. Skaarup and more other places; may easely 

 by mistaken for Ramularia lampsanae Sacc. Sonchus oleraceus. J. Odden!; L. 

 Stensgaard. Hieracium aurantiacum. S. Landbohejskolens Have, Vestre Kirke- 

 gaard. Hieracium pilosella X pratense. F. Skaarup. Hieracium rigidum. J. Odden 

 Skov!. Hieracium danicum. S. 0rsl0v (P. N.). Crepis tectorum. F. Holmdrup; 

 S. Jaegersborg; L. Stensgaard. Crepis paludosa. J. Viborg!; F. Skaarup. Taraxa- 

 cum vulgare (hosp. nov.). S. Lystrup! Bidstrup!. Lactuca sativa very common 

 in the gardens (Dybdahl 77 '''^). Lactuca alnifolia. S. Landbohejskolens Have. 

 Lactuca scariola. S. Botanisk Have. Leontodon auctumnalis. J. Krabbesholm 

 Skov!. Picris hieracioides. F. Vejstrup Aaskov. Tragopogon porrifolius (hosp. 

 nov.). S. Koldemosegaard ! Runddelen!. 



