605 



1897. Dothidea chalybea, Schw., on dry, denuded wood of 

 ITalmia, and 



1898. Dothidea denigrans, Schw. These two are a mere sterile 

 crust, in the latter with sterile perithecia. 



1899. Dothidea Lauri Bourbonice, Schw., on leaves of Laurus 

 Bourbonia (Georgia), only small, black, sterile spots. 



1901. Dothidea penicillata, Schw., on scapes of Allium, &c, 

 has the aspect of a Vermicularia, only there are no bristles, nor are 

 there any spores. 



1909. Dothidea pomigena, Schw., on mature apples, apparently 

 the fructigenous form of Fusicladium dendriticum (Wallr.). 



1910. Dothidea Gentianm, Schw., on fading leaves of Genti- 

 ana ochroleuca; sterile perithecia on black spots. Cooke (Grev. XIII. 

 p. 42) finds sporules of a Phoma 8x1//. 



From 1911-1855, inclusive, all the specimens in Herb. Schw. 

 (except 1041, which is Actinonema Rosaza, Lib.) are sterile, inde- 

 terminable things, entirely without fruit of any kind, or at most 

 only stylosporous, so that it would hardly be worth the while to go 

 over them separately. Many of them are mere discolorations of the 

 leaf or stem, or a mere sterile crust, with or without rudimentary peri- 

 thecia. Cooke (see Grev. XIII, pp. 41-44) has examined specimens 

 of these numbers in Herb. Berk, and finds them, as we do, very unsat- 

 isfactory, mostly without fruit. 



DOTHIDELLA, Speg. 



Fungi Argentini, Pugill. I, Appendix. 



Stroma effused or discoid, thin, black; cells immersed. Asci 

 8-spored. Sporidia ovoid or oblong, uniseptate, hyaline. This differs 

 from Phyllachora in its uniseptate sporidia. 



D. betiilina, (Fr.) 



Sphceria xylomoides, Fr. in Vetensk. Akad. Handl. 1816, p. 143. 

 Sphceria atronitens, Holl. in Fr. Scler. Suec. No. 144. 

 Phyllachora betulina, Fckl. Symb. p. 217. 

 Dothidea betulina, Fr. S. M. II, p. 554. 

 Dothidella betulina, Sacc. Syll, 5256. 

 Exsicc. Fckl. F. Rh. 1015. Rab. F. F. 1638, 2671. Thuni. F. Austr. 970. 



Stromata numerous, gregarious or thickly scattered, often cover- 

 ing a large part of the leaf, and more or less confluent, small, mostly 

 less than J mm. broad, irregular in shape, orbicular or angular, slightly 



