12 Dansk Botanisk Arkiv, Bd. 2. Nr. 1. 



species have observed two spores connected into Puccinia-\ike 

 complexes. 



Entorrhiza caricicola sp. n. which is the only Entorrhiza-spe- 

 cies known on the genus Carex, is found on Carex limosa L. 

 in a bog near Lyngby in the northern Sealand, first by 

 prof. F. Kølpin Ravn in Septbr. 1893, later by dr. C. H. Osten- 

 feld »in radicibus Caricis limosae inter muscos; S elan di ae, 

 Lyngby, in turfosis. 27. 10. 1895«. 



By J. Lind (1. c. p. 271) the fungus is enumerated under the 

 name adopted by E. Rostrup: E. cypericola (Magn.) De Toni. 



IV. The species of the genus Entorrhiza. 



The genus Entorrhiza was founded by C. Weber in 1884 (1. c) 

 upon the Juncus bufonius-Entorrhiza, E. Aschersoniana (Magn.) 

 De Toni, which thus must be considered as the type species. It 

 is the merit of P. Magnus, however, to have signalized to science 

 the first species of this genus in that he already in 1878 published 

 his Schinzia cypericola (1878, p. 53) ; this mycologist namely was 

 of opinion that his fungus belonged to the genus Schinzia 

 founded by K. Nägeli in 1842 (1. c, p. 281) on Schinzia cellulicola 

 in the roots of Iris sp. 



Whatewer it may be one must maintain that the belonging 

 together of the two last named species is very doubtful, because 

 Nägeli in his description and figures of E. cellulicola omits some 

 features exceedingly characteristic of the genus Entorrhiza. Further 

 the integrity of the genus Schinzia has been shaken by authors 

 who have referred quite heterogeneous elements, viz. Schinzia 

 Alni Wor. and S. Leguminosarum Frank, to this genus. 



The point of view being justified that Schinzia cellulicola 

 Näg. is not a true Entorrhiza and considering furthermore the 

 E. Solani Fautrey (1. c.) as problematic, the genus Entorrhiza 

 thus shows to be confined only to glumiflorous host-plants, even 

 if the tumours of the plants mentioned by P. Magnus (1888, p. 104) 

 might turn out to be produced by fungi belonging to this genus. 



In conclusion the following organisms must be considered as 

 true Entorrhiza-species : 



On Juncaceae: 



E. Aschersoniana (Magn.) De Toni (Juncus bufonius L.). 

 E. Casparyana (Magn.) De Toni (Juncus Tenageja Ehrh.). 

 E. digitata Lagerh. (Juncus articulatus L. coll., probably 

 always J. alpinus Vill.). 



