no 



311. Sclerotinia Duriaeana (Tul.) Quel, Syll. Vlir'^ Rehm 111"^°. 

 Carex paniculata. F. Stubbekebing Gaasso (^^/t 80). 



311 b. Sclerotinia Aschersoniana P. Henn. 6. Ploettner, Syll. 

 XVI "I 



O. Rostrup cultivated the sclerotied fruits for Vh years before they 

 produced ascomata, from July 1896 to May 1898. 



Carex paludosa. S. Jsgerhuset (O. R.). Carex paniculata. S.Trorod Mose (O.R.). 



312. Sclerotinia alni Maul, Rehm Iir"^ Lit: O. R. 97 '", Bubak 



04 c, R 97 m "' a 02 

 a ^^- c. icon. 



O. Rostrup culti- 

 vated the sclerotied 

 fruits for IV2 years 

 before they produ- 

 ced ascomata, from 

 November 95 to 

 March 97 and from 

 October 96 to March 

 98. He believes the 

 infection to take place 

 in the buds in spring. 

 I have found the as- 

 comata in greatabun- 

 dance in the forests 

 in February and 

 March and watched 

 them fling out asco- 

 spores in clouds at 

 that time, so I must 

 believe that the infec- 

 tion takes place du- 

 ring the blossoming 

 of the trees which 

 occurs just then. Both 

 O. Rostrup and I 

 have found a few as- 

 comata on the male 

 catkins. 



Alnus incana. J. Un- 



dallslund! (Exs. Vgr.); 



S. JonstrupV'ang (Raun- 



kia;r), Gammelmose, Kobenhavn (2^/12 95 O. R.), Falst. Beta Nor (R 99 b). Alnus 



glutinosa. J. Skagen, Saeby ; S.JonstrupVang(Raunkiaer), VestreKirkegaard (O.R.). 



Fig. 9. Sclerotinia alni. 

 Twigs of ,\lnus with affected catkins, 4 sclerotia with asco- 

 mata — , 2 asci, 3 ascospores. From R 02 a. 



