4 i2 TEXT-BOOK OF FUNGI 



name Oidiopsis a name previously given to the conidial 

 form of E. taurica for its reception. 



A new sub-family is also proposed for the reception 

 of this new genus, called Oidiopsideae, characterised as 

 follows : 



Mycelium at first wholly endophytic, producing conidio- 

 phores sent up through the stomata ; perithecia produced 

 on the hyphae of a superficial mycelium originating from 

 the endophytic mycelium. 



Salmon, Ann. Bot.> 20, p. i (1906). 



Sexuality of the Uredineae 



A brief summary has been given of Blackman's investiga- 

 tions on a peculiar process observed in Phragmidium 

 violaceum, where the nucleus of an ordinary vegetative cell 

 migrates into a special ' fertile cell/ which then develops 

 and gives origin to a chain of binucleate aecidiospores. 

 The fertile cell was considered to be a female cell, and its 

 union with the vegetative cell as a ' reduced sexual process,' 

 in which the vegetative cell replaces the now functionless 

 spermatium. 



Christman, as already explained, also investigated other 

 species of the Uredineae, Phragmidium speriosum, etc., 

 and found that in some species two of Blackman's uni- 

 nucleate 'fertile cells ' conjugate in pairs; from such fusions 

 binucleate cells are produced, which give origin to chains 

 of aecidiospores. 



Christman differs from Blackman in considering the 

 conjugating cells as ordinary undifferentiated gametes. 



