ADDENDA 



411 



served for nine months, showed that the extract was as 

 active as that obtained from fresh material. Thus milk 

 was clotted in fifteen minutes ; an 0-2 per cent, of Lintner's 

 starch solution underwent complete hydrolysis in three 

 hours, and gelatine was liquefied in about the same time 

 as with fresh material. Such material is therefore well 

 suited for experiments by students in the laboratory. 



Buller, Ann. Bot.> 20, p. 49 (1906). 

 Bourquelot, Bull. Soc. Myc., 1893, P- 2 3 J - 



An endophytic Member of the Erysiphaceae 



A brief account of the endophytic nature of the conidial 

 form of Erysiphe taurica^ as noted by Salmon, has already 

 been given. This author has now published a fuller 

 account, and points out that E. taurica, during its conidial 

 stage, differs from all other known Erysiphaceae in two 

 main points : the complete absence during this stage of 

 any mycelium on the surface of the leaf, and the presence 

 of conidiophores emerging singly or in bundles through 

 the stomata: 



A further peculiarity is presented by the conidiophores 

 which are frequently found to be branched, a character 

 not previously known to occur in the family. 



In the later stages of the conidial condition mycelial 

 hyphae emerge in great numbers through the stomata, and 

 form an external mycelium on the surface of the leaf 

 preparatory to the formation of perithecia. 



On account of the peculiarities enumerated, Salmon 

 considers that E. taurica differs generically from the other 

 members of the Erysiphaceae, and proposes the generic 



