N&W OR XOTEWOETIIT FU>'GI 315- 



On dry dead blackening leaves and twigs of Vaccinium Vitis-idcsa. 

 Cheviots ; Shropshire ; Ayrshire, etc. 



There is no doubt this is the pycnidial stage of Phocidhim 

 Vaccinii Fr. The conceptacle is sometimes unilocular, but it is often 

 imperfectly divided like most of the Cytosporas ; in its habit (erum- 

 pent by laciniae) it reminds one of a Pliacidium, and its spores are 

 so exactly like those of Geutliospora phacidioides, which is the 

 spermogone of Phacidium multlvalve K. & S., that it is evidently 

 a member of that form-genus. Nevertheless in its sometimes 

 l)otryose pycnidia it tends towards Dofhiorella, and is in fact inter- 

 mediate between that and Ceuthospora. See Massee, Fung. Fl. 

 iv. 57. 



It is interesting to note that, while our British specimens accord 

 exactly with those ordinarily met with in Germany, Sweden, and 

 Finland, 07ie example published by Fries (Scler. Suec. no. 281), as 

 shown in sections kindly cut by Miss E. M. Wakefield, contained in 

 the same conceptacles and on similar sporophores some brown spores, 

 which differed from the colourless ones mixed with them only in 

 Ijeing less linear and slightly more irregular. These could be hardly 

 anything else than a further development (? more mature) of the 

 Ceuthospora spores, for stages intermediate in colour were observed 

 among them. The slides ai'e preserved in the Kew Herbarium. 



276. Ascocliyta Boydii, sp. n. 



Phyllosticta Alismatis Sacc. & Speg. Mich. i. 144. Sacc. Syll. 

 iil. 60. 



Maculis in quoque folio plerumque paucis, sinuosis v. irregulari- 

 rotundatis, 5-12 mm. lat., pallide brunneis v. albidis, margine 

 oastaneo v. brunneo-fuligineo cinctis. P3^cnidiis epiphyllis, copiosis, 

 50-130 ju diara., pallide brunneis, dein obscurioribus, ]3oro pertusis ; 

 contextu vere ascochytoidea. Sporulis primo obovoideis vel ellip- 

 soideis, continuis, dein oblongis, 1-septatis, sfepe curvatis flexisve, 

 utrinque rotundatis v. basi acutis, ssepius biguttulatis, omnino achrois, 

 10-12 X 2-21 |u. 



Hab. in foliis vivis Alismatis Plantaqinis. Stevenston, Ayrshire 

 (Boyd); Cheshire (Ellis). Jul.-Sept. 



This is undoubtedly a more advanced state of Phyllosticta Alis- 

 matis S. <fe S. ; the spots are exactly of the same character. But 

 what its relation is to the Ascochyta Alismatis of Trail or of Ellis & 

 Everh. it is difficult to say : the spores of these latter (which are the 

 same species) are longer and quite straight, and the spots are far 

 more numerous, different in colour, and only 1-2 mm. broad. 



277. Ascochyta Equiseti Grove. 



Phoma Equiseti Desm. Exs. no. 183. Sacc. Syll. iii. 168 ; x. 187. 

 Spharia Equiseti Sacc. Syll. ii. 442. 



P3-cnidia seriate or widely scattered, oval or subglobose, immersed, 

 blackish, 200-300 )u diam., covered by the bleached epidermis, which 

 is then pierced by the minute ostiole and afterwards more widely 

 torn ; texture soft, pale brown, pseudo-pycnidial. Spores at first 

 ovoid, continuous, biguttulatc, 6-7|x3/,<, then oblong, 1-septate, 



