277 

 E. Rostrup. 



The first cultivating experiment made by Rostrup was made in the 

 forest "Vejstrup Aaskov"; the result which Rostrup thought he had 

 obtained (the relation of Aecidium orchidearum to Puccinia moliniae) 

 must be considered as very dubious and has not been confirmed later 

 on (see Klebahn 94 ^'s^ g^zes^ 98 2i_ ggiss^ yg^. 0390^ r 74 b_ j^gi 94) 



Rostrup also occasionally mentions (82 b '', 84 a, 88 n '"') that he has 

 infected Rheum with teleutospores of Puce. Magnusiana; strange to 

 say the same mistake is also found with Schroeter (see Klebahn 04 ^'^) 

 and P. Nielsen (in herbario); it must, no doubt, be owing to a wrong 

 determination of the Puccinia. 



In 1883 Rostrup made successful cultivating experiments by which 

 he proved the correspondence between Caeoma pinitorqua and Me- 

 lampsora pinitorquum (R 83 d 6^ 84 a). 



In 1898 Rostrup stated the relation between Aecidium thalictri mi- 

 nus and Puccinia elymi Westd. (R 98 b"''). Rostrup also often found 

 the right correlation by observations from nature, on several occasions 

 in company with C. J. Johanson; all these observations have later on 

 been confirmed by cultivating experiments made by others for instance : 



Puccinia dioecae Magnus see R 84 a ^*. 



Puccinia paludosa Plowr. see R 89 b ^*^. 



Puccinia eriophori Thiim. see R 84 a ^^. 



Puccinia littoralis Rostrup. 



Melampsora abietis-caprearum. 



Coleosporium euphrasiae (Schum.) Wt. see R 94 f ^'. 



Coleosporium campanulae (Pers.) Lev. see R 94 f ''. 



C. Gad. 



1885 C. Gad infected the leaves of Populus tremula with caeomaspores 



from Mercurialis (Melampsora Rostrupii). 

 — — infected Crataegus nigra and Crataegus monogyna rubri- 

 flora with teleutospores of Gymnosporangium clavarii- 

 forme. 



1886 — infected Pirus malus silvestris with teleutospores of 



Gymnosporangium tremelloides. The same experiment 

 was repeated by Rostrup the following year in Copen- 

 hagen on Pirus malus hortensis (see R 88 c 6^ 90 a "^). 



P. Nielsen. 



During the years 1870—1883 P. Nielsen, then schoolmaster and 

 sexton at 0rsl0v in Seeland, made a great many excellent cultivating 



