NEW OK NOTEWOKTHY FUNGI 289 



the Phleospora, the pustules of which are amphigenous, hut the 

 pycnidia of the PhyJlosticta are entirely hypophyllovis and occur for 

 the most part in a dense border round the spots. I have specimens 

 of Phleospora JJImi Walh\ which are equally accompanied by a 

 Phyllosticta. 



Mr. Boyd's specimens have spores in all respects identical with 

 those of the fungus which has been already recorded under no. 241 

 (Journ. Bot. 1916, p. 219) as Leptothyriitm Platanoidis Pass., and 

 in the Staffordshire specimens that was also accompanied by the 

 Phleospora. Comparison of these with examples of the PltyUosticia 

 received from Sydow show that they are all forms of the same fungus, 

 although the pycnidia differ somewhat in texture ; and it would seem 

 therefore that, at least so far as the British specimens are concerned, 

 the " Leptothyrium " is a state of the Phyllosticta with pycnidia less 

 complete below, and that both may be genetically connected with the 

 Phleospora. Possibly, also, they maybe stages of a Mycosphcerella 

 like M. latehrosa (Cooke), for the beginnings of an ascophorous stage 

 with perithecia deeply inunersed were occasionally observed. 



It was noticeable that most of the pycnidia had the pore situated 

 just beneath a stoma ; this habit can be observed in many others of 

 the Sphseropsidales. 



262. Phyllosticta punctifokmis Allesch. vi. 129. 



Phoma punctiformis Desm. in Ann. Sci. Nat. 1849, xi. 283. Sacc. 

 Syll. iii. 145. 



Pycnidia amphigenous, but chiefly epiphyllous, numerous, scattered, 

 without any distinct spots, subglobose, papillate, covered by the 

 epidermis, which is at length penetrated by the pierced ostiole, 

 blackish-brown, 125-200^ diam. ; texture pale-brown, thin, darker 

 round the pore. Spores narrow-oblong, 4-6 X 1^ jx, but variable. 



On fading leaves of Lychnis dioica. Largs, Ayrshire (Boyd). 

 Sept. 



The pycnidia are visible to the naked eye as black dots spread 

 pretty uniformly all over the leaf, and not only on the faded parts. 

 The texture of the pycnidium supplies a real reason why this sjx'cies 

 should be placed in Phyllosticta, not the shallow futile reason 

 alleged by Allescher. 



263. Phoma anceps Sacc. Syll. iii. 120. 



var. PoLYGONi var. nov. 



Pycnidiis gregariis v. in imo caule dense effusis, ca. 100 /x diam., 

 lentiformibus, orbicularibus, nigris, sub epidermide nidulantibus, dein 

 plus minusve erumpentibus ; contextu molli parenchyniatico fuligineo 

 irregulari. Sporulis bacillaribus vel anguste oblongis, utrinque rotun- 

 datis, at basi subangustioribus, 2-4-guttulatis, 11-15x2-2^^, sed 

 interdum uscjue 20^ longis, sporophoris similibus, brevioribus et sub- 

 angustioribus suffultis. 



Hab. in caule Polyyoni cuspidati., in Horto Botanico, Birming- 

 ham, Martio. Inter P. ancipitem et P. bacillarem Sacc. quasi 

 media. 



