Rev. M. J. Berkeley on British Fungi. 



365 



large nuclei in the upper cell, and sometimes one in the 

 lower cell*. 



Tab. XI. fig. 6. a, spores from fresh plants; b, ditto from dry plants. 

 Both highly magnified. 



204. A. Brassicce, Chev., FL Par. 1. p. 449. On decayed 

 cabbage leaves. Common. This has quite the habit of a 

 Depazea. There are no fibres, but they do not seem to con- 

 stitute by themselves the essential character of the genus. 

 Dothidea Alchemillce has fibres sometimes, though the con- 

 trary is stated in the ' English Flora/ and it is then externally 

 an Asteroma, but it has true asci ; and the perithecia, as in 

 Dothidea Chcetomium, are beset with short bristles, which are 

 however to be seen only on very close examination. 



205. Leptosiroma vulgar e, Fr. Syst. Myc. vol. ii. p. 599. 

 On dead stems of Artemisia, Berwick. Dr. Johnston. 



206. Diplodia Ilicicola^ Desm. ! exs. n. 988. On small 

 branches of holly. Milton, Norths. The true distinction be- 

 tween this genus and that of Sphceria is, that the fructifying 

 bodies are not asci containing sporidia, but spores produced 

 on sporophores, exactly as in the analogous genus Melanco- 

 nium, which differs principally in having no perithecium. 



Tab. XI. fig. 7. a, young spores; b, perfect spores on their sporophores. 

 Both highly magnified. 



207. D. Viticola, Desm. ! exs. n. 989. On vine branches. 

 King's Cliffe. I have also found a Diplodia on branches of 

 raspberry. Stilbospora biloculata, Johnst. ! belongs to this 

 genus. The species at present have not been sufficiently 

 studied, and it will probably be found that many are forms of 

 Sphceria mutila. In an early stage of growth the perithecia 

 are filled with a delicate white cellular tissue, when they re- 

 semble small Sclerotia. This gradually vanishes in the centre, 

 and the portion towards the circumference becomes fertile. 

 This is also the case with certain species of Sphceria, which 

 will hereafter probably constitute a new genus. Amongst 

 them is the curious S. phccocomes, which I have found in fruc- 

 tification, and of which I have given a figure. Tab. XI. fig. 8. 



* I have used the term nuclei to include oil drops or real granules, as it 

 is not always certain what is the nature of the bodies commonly called spo- 

 ridiola. They certainly have some important influence on the vegetation, 

 like the cytoblasts of higher plants. I have seen a sporidium of Sphceria 

 biformis germinating while yet in the perithecium, and opposite to every 

 nucleus a distinct filament was given oft; See Tab. XI. fig. 8. b. 



[To be continued.] 



