NEW OK NOTEWORTHY FUNGI 291 



bordered spots (wanting in the Phomojjsis), and is a true Septoria, not 

 a Ithahdospora as Saccardo places it in Sjll. iii. 5S0. It has a com- 

 plete thin-walled plectenchymatous pycnidium ; the spores are cylin- 

 drical, straight or curved, finely guttulate and at length pseudo- 

 triseptate, 20-27 X l|-2 )u. But what Berlese calls the var. crassius- 

 cula seems from the description more likely to be identical with 

 Fuckel's species, though this is mere surmise ; in tliat case both 

 jB. ramealis and its variety have been wrongly placed. 



267. Phomopsis Eres Grove. 



Phoma Eres Sacc. Mich. i. 521 ; Syll. i. 631. 



Pycnidia scattered, conico-eonvex, 250-300 ^ diam., blackish, 

 covered by the periderm and only after a long time erumpent by a 

 pore. A-spores elliptic-fusoid, acute at both ends, biguttulate, 

 9-10 X 2|-3 jjL ; sporophores linear, straight, simple, crowded, 18-20 x 

 2 p. ; mixed with them a few B-spores, 25-30 x 1 //. 



On dead twigs of Elm. West Kilbride, Ayrshire (Boyd). Dec. 

 Cooke's specimens under this head are incorrectly named. 



This is a very typical Phomopsis, the pycnidial wall being of the 

 usual imperfect character. The young pycnidia, situated in the 

 cortex, are surrounded by a white zone of densely felted mycelium, 

 composed of much-branched hyphse. There is, in some cases, a thin 

 black line deeply penetrating the wood below the fungus : this is 

 probably the beginning of the DiaportJie-stas^e. There cannot be 

 the slightest doubt that this is the true species of Saccardo ; Nitschke, 

 who saw the B-spores, described thera as curved, 33 X 1 /i, and recog- 

 nised them as a pycnidial stage of his Diaporthe Eres (Pyr. Grerm. 

 p. 245), but he observed that they always appeared in different pyc- 

 nidia from the A-spores. Whether Phoma ohlonga Desm. is really 

 the same as the latter, as Saccardo suggests, is not certain. 



268. Phomopsis pustulata Grove. 

 Phoma pxistulata Sacc. Syll. iii. 91. 



Pycnidia rather scattered, long covered by the peridenn, jDUstular, 

 convex, \-\ mm. diam., roundish, seated on the wood, at length 

 erumpent at the summit. A-spores oblong-fusoid, jiluriguttulate, 

 somewhat obtuse at the apex, 10-14 x 2;^ -3^ yu ; sporophores acicular, 

 colourless, about as long as the spore : B-spores numerous, filiform, 

 curved or hooked, 15-20 x 1-1 1 ^, mixed with the A-spores. 



On dead branchlets of Acer Pseiuloplatanus. Stewarton, Ayr- 

 shire (Boyd). Dec. 



The pycnidium of Diaporthe {Chorostate) pustulata Sacc, which 

 occurred with it on the same branchlets. As usual with the pycnidia 

 of the subgenus Chorostate, the A-«pores incline towards Fusicoccum. 

 The perithecia were in groups of 4-12, erumpent by a slit; each had 

 a rather thick slightly protruding pa])illate and umbilicate ostiole, and 

 otherwise agreed exactly with Saceardo's description of D. pustulata ; 

 the groups were surrounded l)y a l)lack line which penetrated the 

 wood. The ascospores closely resem])led the A-spores, but were 

 larger, constantly 4-guttulate, and slightly constricted at the septum. 



