454 FETCH : 



Tl\e present classification of the SphjBrioidacese-Pliseodidymae 

 is given in the following table : — 



A. — Pycnidia isolated, stroma wanting. 



(a) Pycnidia innate or erumpent. 



* glabrous. 



I spores destitute of mucus. 



§ spores exceeding 15 [x Diplodia Fr. 



§§ spores less than 15 ^j, Microdiplodia Alles. 



fl spores large, surrounded by mucus 



Macrodiplodia Sacc. 

 ** pilose or setose. 



f without a rostrum Chcetodiplodia Kars. 



If with a rostrum Rhynchodiplodia Br. et Farn. 



(b) Pycnidia superficial, or sub -superficial. 



■\ without a rostrum Diplodiella Karst. 



f I with rostrum Pellionella Sacc. 



B.— Pycnidia united into a stroma. 



(a) Stroma glabrous Botryodiplodia Sacc. 



(6) Stroma pilose Lasiodiplodia Ell. & Ev. 



(c) Stroma granulato-rugulose Diplodiopsis P. Henn. 



This key appears quite definite, but in practice it proves 

 quite unworkable. Brick places the species under discussion 

 in Lasiodiplodia, as his specimens were furnished with a 

 stroma, clothed with hyphse : and as far as his specimens 

 permitted him to judge, his view was quite correct. But it 

 must be remembered . that they had been developed under 

 abnormal conditions. Griffon and Maublanc also place this 

 fungus in Lasiodiplodia under the name Lasiodiplodia theo- 

 hromce (Pat.) Griff, et Maubl., but it would appear doubtful, 

 from their figures, whether the pycnidia were contained in a 

 true stroma. On the other hand, Hennings decided that it 

 was a simple Diplodia ; and Howard was of opinion that the 

 fungus should stand as a simple Diplodia, not as a Botryo- 

 diplodia. Butler, however, states that in its natural habitat 

 in Bengal on the sugar cane the fungus must be considered a 

 Botryodiplodia, not a Diplodia. 



