68 



larly 4—5 times furcated, at the end of each branch an eUiptical, pale- 

 brown conidie is laced off. The conidies measure 20—28 ^^ X 15—20 t^. 

 In the cellular tissue are found numerous oospores 35—38 M^ in dia- 

 meter, the wall is 7—8 i^ thick. 



Cyfisus laburnum. J. Viborg!; S. Roskilde (1888 J. Buch), Kebenhavn 

 (O.K. a!). 



75. Peronospora Candida Fuckel, Syll. VIP=^ Fisch. IV'", Syn: 

 Per. oertehana Kuhn, Syll. IX '*'', Kodriverskimmel (R 04 a ''). 



The mycelium is perennial in the subterrannean parts of the host- 

 plant and affects all leaves of the diseased plants. May. 



Primula elatior. F. Hjallese (^^/s 97. Jak. Lge. see R 99 a 256), s. Haslev 

 Orned! (Exs. Sydow). 



76. Peronospora myosotidis de By., Syll. VII =''^ Fisch. IV''=^ 

 Forglemmigejskimmel (R 04 a 2°), April— July, common on the leaves 

 of Myosotis, f . inst. noticed from following places : 



Lithospermum arvense. S. Lundby (Jak. Lge). Myosotis arenaria. S. Bognses. 

 Myosotis versicolor.]. Viborg ! , S. Lyngby (M. L. M.). Myosotis silvatica. F. Ringe! ; 

 S. Kabenhavn. Myosotis arvensis. F. Klingstrup Ch 80); S. Charlottenlund. 



77. Peronospora asperuginis Schroet., Syll. VIP"', Fisch. IV ''''^. 

 June— July. 



Asperugo procumbens. F. Hundrup (Jak. Lge); S. Seiborg (Exc. '''•/e 84), 

 Hammer! . 



78. Peronospora sordida Berk., Syll. VIP«^ Fisch. IV ''^\ Brun- 

 rodskimmel (R 04 a '">). 



This species is, according to Berlese (98), very closely related to 

 the two succeeding ones. It occurs in July— October as small spots on 

 the leaves and may prevent the affected plants from putting forth 

 flowers (R 85 a). The form on Verbascum was originally considered 

 a subspecies by Rostrup (R 79 ''''), and he published it in Thiim. myc. 

 under the name of Peronospora sordida f. verbasci thapsi. 



Verbascum thapsus. F. Vejstrup Aaskov ('/e 77 and again June 83, Exs. 

 Thiim. Myc. No. 2216); Lang. Carlseje; L. Hillested. Scrophularia nodosa. J. 

 Marsvinslund ! ; F. BJ0rnemose (''''/s 74); S. Ruderhegnl, Basnaes (P. N.), Ham- 

 mer ! ; L. Sallested. 



79. Peronospora antirrhini Schroeter, Syll. VII "^ Fisch. IV "'^ 

 Antirrhinum orontium. F. Dalum C'/t 90 Jak. Lge). 



80. Peronospora linariae Fuckel, Syll. VII '^\ Fisch. IV *''\ Torske- 

 mundskimmel (R 04 a 2°). 



The mycehum penetrates the whole of the top of the plant which 

 becomes conspicuously tumourous and whitish in appearance. June- 

 August. 



