C. Ferdinandsen and Ö.Winge: TJie genus Entorrhiza C.Weber. O 



hyphae originate in Entorrhiza digitata, have a striking likeness 

 with the corresponding organs in the true Ustilagineae, not least 

 by the marked deliquescence of the filaments (fig. 1, e). 



Concerning the cytology of the Ustilagineae Dangeard, Lut- 

 man and Rawitscher 1. c. have shown that a syncaryon-stage 

 is established earlier or later during the ontogenesis, the young 

 spores obtaining always two nuclei which later on fuse together 



' 



> i 





/ 



* 

 if. 



1 



; 



Fig. 2. E. Raunkiæriana sp. n. a — b: Spores with few rather distinct nuclei. 

 c — e: Spores with numerous chromatin bodies in the cytoplasm, ii^oo. 



within the spore. — As to Entorrhiza we have not succeeded in 

 making out its cytology, but in several cases we have seen that 

 the spores as well in E. Raunkiæriana sp. n. (fig. 2, b) as in 

 E. digitata have two rather distinct nuclei. Often, however, the 

 nuclear elements have another appearence. Thus, in E. Raunkiær- 

 iana, three or more nucleus-like organs (fig. 2, a) are to be seen 

 in the cytoplasma, but mostly distinct nuclei are not present, 

 a number of chromatin bodies being scattered all around in the 



