On Lasiodiplodia. library 



NEW YORK 

 BY BOTANICAL 



T. FETCH, B.A., B.Sc. GARDEN. 



THE genus Diplodia forms a huge unwieldy group of weakly 

 differentiated species, and any method of subdividing 

 it into smaller groups would be welcomed. But it is evident 

 that some of the present subdivisions, though they may appear 

 distinct on paper, only lead to confusion in practical mycology. 

 Saccardo, in " Sylloge Fungorum," Vol. III., adopts the 

 following scheme of subdivision : — 



§ Pycnidia discreta. 



f Pycnidia tecta vel erumpentia. 

 Diplodia. — Pycnidia glabra ; sporulse strato mucoso 



carentes. 

 Macrodiplodia. — Pycnidia glabra ; sporulse strato mucoso 



obvolutse. 

 Chcetodiplodia. — Pycnidia pilosa ; sporulae strato mucoso 



carentes. 



ft Pycnidia lignicola, subsuperficialia. 

 Diplodiella. — Pycnidia subcarbonacea, papillata. 

 §§ Pycnidia caespitosa. 



Botryodiplodia. — Pycnidia csespitoso-erumpentia. 



Except that Chcetodiplodia may be " setosa vel pilosa," no 

 further differences are disclosed by the subgeneric descriptions. 



In the "Botanical Gazette," Vol. XXI., No. 2, p. 92 

 (February, 1896), another subgenus, Lasiodiplodia, was de- 

 scribed by Miss Ida Clendenin. The fungus for which this 

 subgenus was instituted, Lasiodiplodia tuber icola, was found on 

 sweet potatoes which had been imported from Java, and was 

 submitted to EUis, who decided that it was worthy of separate 

 generic rank. Hence Lasiodiplodia is attributed, in the article 

 referred to, to Ellis and Everhart. The generic characters 



[Annals of the Royal Botanic Gardens, Peradeuiya, Vol. IV., Part VII., Sept., 1910.] 



6(11)10 (58) 



Cr-. 





