199 



The pyenidia 



most 



subgregarious 



and broader 



milch smaller and less erumpent, and at 



in clusters) ; the spores are longer 



x 12-14 /i). In Botryodiplodia Fraxim 



trace all imaginable forms intermediate 



(not 



(28-32 

 it is possible to 

 between the so-called Macrophoma Fraxini and the most 

 congested state; as has been shown in another place, facts 



us to believe that a fungus of this 



cicul 



state, 



group 

 from 



ran 



require 



from a scattered to 



has colourless spores (when young) up 



brown spores (when mature), and from continuous to uniseptate 



van 



one whicli 

 to one which has dark 



time 



often to be found intermingled on the same twig or branch. The 

 same thing is no doubt true of the species on Ailanthus ; there is 

 always a tendency in both for the simpler forms to grow i 

 the smaller branchlets. 



pon 



A few short notes on other species which have been examined 

 may now be added : 



442. Phonia enteroleuca, Sacc. 



This is represented in the Herbarium by four specimens, all 

 different, and none of them agreeing with Saccardo's description 

 which seems to be that of an abnormal state of some common 

 species in which the cavity of the pycnidium was filled with 

 a subsclerotial growth of cells, such as is not infrequently met 

 with, and which is in most cases the preparation for the produc- 

 tion of ascospores. Probably the " species can never be 

 recognised again with certainty. 



447. Phoma Rubi, Westd. 



" Phonia Buborum, Westd.," ex errore in Sacc, Syll. iii. 76. 

 This specimen of Westendorp, on small branches of Rubus, 

 Is a Cytospora, and is indistinguishable from some of the forms 



~ (7. ambient Jwhich ~ 



assignee 

 measure 



to 



x 



1 



h 



appear on Rubus ; the spares 

 though sometimes larger. 



Phoma Ruborum, Bourn. Funsr. Gall. no. 3563! is quite 

 different; it has hyaline didymous spores and a disc surrounded 

 by a few olivaceous setae. 



459. Phoma Granati, Sacc. 



Macrophoma Granati, Berl. & Yogi, in Sacc. Svll. Addit. p. 



315. 



The description is correct, except that the spores are often 

 1-guttulate, faintly coloured in mass, 10-15 x 4-5 p. (Fig- 22.) 



■ . 



' 



■ 



F^ 







m ft 





P. Granati. 





