550 



3310. Exosporium hysterioides (Corda) Hohnel, Ldau IX ^^\ 

 Syn: Hormiscium hyst. Sacc, Syll. IV ^^^ LdauVIIlT Cryptocory- 

 neum fasciculatum Fuckel, Syll. IV '^=, see v. Hohnel 02^"'= 



On bark and wood of Betula alba. S. Geelskov (O. R.), Sora ^^li 81 (V. Sa- 

 (rauw. On wood of Fagus. S. Tokkekab Hegn (O. R.), Dyrehaven (O. R.), Lyng- 

 by ! . Quercus robur. F. Klingstrup. Sorbus aucuparia. J. Dronninglund Storskov ! . 



3311. Exosporium tiliae (Fries) Link, Syll. IV "^ Ldau IX«'» 

 c. icon., Syn: Helminthosporium tiliae Fries S. M. III'*". 



Very common on bark of dead branches of Tilia europaea, Octob. — May. 



Spegazzinia. 



3312. Spegazzinia ammophila Rostrup 96 m ^^^ c. icon., Syll. 

 XIV ^^^^ Ldau IX "= c. icon. 



Fig. 41. Spegazzinia ammophila. 



Stromata gregaria, convexa, nigra, 45—80 f^ diam. Conidia sessilia, 

 varia, fusca, 18—26 M^ X 8—16 f*, 1— 3-septata vel ad modum Sarcinae 

 4—6 cellularia. R. 



Very common on dead leaves of Calamagrosiis arenaria &. Hordeum are- 

 narium (see R 99 a "b a 99 b. Exs. Kab. a Bub. no 500). 



Mycelia sterilia. 



Rhizoctonia. 



3313. Rhizoctonia violacea Tul., Syll. XIV "'^ Ldau IX«»^ Syn: 

 Rhizoc. crocorum Pers., Fries S. M. II ^'^ Rhizoc. medicaginis de C, 

 Fries S. M. II ^«=, Almindelig Rodfiltsvamp (R 93 d ^^o c. icon.), Lit: 

 R 78, 84 j, 85 n, 85 h, 86 d, 86 k, 88 a '^\ 89 g, 90 1, 94 e ^°° c. icon., 

 94 g, 02 a "'', Johansen 86. 



This fungus occurs upon the roots of many different plants. It is 

 a pest of importance in forest tree nurseries as well as in the field. 

 The first Danish specimens is found by P. Nielsen on Daucus at the 

 year 1878. It was quite common throughout the country upon roots 



