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



plasm, without nuclear membrane, and connected to each other 

 with linin threads (fig. 2, c — e) 1 ). 



In conclusion it seems to be justified — in spite of the 

 »Acrostalagmus-like« germination — to place Entorrhiza and pro- 

 bably also Schroeteria in the neighbourhood of the Ustilagineae. 

 Especially Entorrhiza might be considered as a primitive type of the 

 said group on account of the morphologically well marked copulation 

 observed by us by the spore formation in E. digitata — and further 

 the ProustilagoAike germination stated by Weber in E. Ascher- 

 soniana. It is in accordance with this view that all the species 

 of this genus live in the soil and spread their spores by aid of the 

 water, while the genuine Ustilagineae are adapted to an aerial life. 



III. The genus Entorrhiza in Denmark. 



E. Aschersoniana (Magn.) de Toni. 

 Syn. : E. cypericola Weber e. p., Schinzia Aschersoniana Magn. 



On revising the material available in the collections of the 

 Botanical Museum of the Copenhagen University, all collected 

 on Juncus bufonius, we found the spores always being elliptical 

 with regular sculpture and thus distinctly differing from the sphe- 

 rical, coarsely and unregularly warted ones in E. Casparyana (Magn.) 

 De Toni (fig. 8). In some cases we have observed the spores being 

 provided with adherent screwed filaments and channels (germinat- 

 ion pores?) through the walls. We have found the spores more 

 varying and as a rule bigger than stated by P. Magnus (1888, 

 p. 103), who has measured them 15 — 17 ^ 11 — lb p. Schroeter 

 (1889, p. 290) states 17—20 ^ 15—17/,. In the following all the 

 Danish localities hitherto known are enumerated. 

 Sealand: Charlottenlund, field sloping towards the sea. July, 1885 



(E. Rostrup). Sporesyet immature. A single one ll l h^lbti. 



Constantia, Aug. 14, 1885 (E. Rostrup). Sp. 16—22^: 



12—18 ix. 



Rørvig, June 21, 1914 (C. Ferdinand sen). Sp. immature, 



17 1 ,-^15/*. 

 Jutland: Randbøldal, Sept. 12, 1885 (E. Rostrup). The material 



destroyed. A single spore 20^ 15 pt. 



*) In this connection we can state that in Schroeteria Decaisneana (Boud.) 

 De Toni we have seen as a rule two nuclei in the young spores, 

 a single or three though being also observed (c. 60 n Jo : 2 nuclei, c. 30°Jo : 1 

 nucleus, c. 10°lo : 3 nuclei). 



