XEW Oil XOTKWfMMllV FUXOF 145 



Hal), in ])otloli.s folioi'uin Pohipodii l^hegopieridis, soeia Septoria 

 Puli/podii, Gluii Fiilloch, Perthshire (Boyd), Slaio. 



Whether i\ii& = Lapfosfromella Jllicina (B. & C.) Sacc. must be 

 uncertain, since the spores of that are unknown ; but it does not 

 agree even in the other charactei-s. Though the similarity of the 

 spores of this and the Septoria (see no. 349) is so great that one 

 cannot help suspecting (since they occur on different parts of the 

 same leaf) that they are stages of one and the same species, yet, in 

 view of the great difference in their pycnidia, it is impossible to do 

 otherwise at present than consider them to be distinct. The Septoria 

 has the normal complete all-round subglobose pycnidium of its type, 

 entirely enclosing the })roliferous stratum except for a minute round 

 pore ; the Leptostromella has an incomplete linear pycnidium, opening 

 by a slit, and the texture of the upper part, instead of being pseudo- 

 parenchymatous, is made up of loose mealy roundisli cells, as in a 

 normal Leptotlujrium. The sporophores spring from the lower level, 

 which is a proliferous stratum only, having no distinct pycnidial wall. 



360. Gioeosporium Diervillse, sp. n. 



Maculis rotundatis, 3-4 mm. diam., pallidis, dein albicantibus, 

 margine lato rubescente cinctis. Acervulis epiphyllis, circularibus, 

 depressis, nigrescentibus, usque 100-125 /x. diam. Sporulis oblongis, 

 curvulis V. arcuatis, utrinque obtusis, 2-pluri-guttulatis, achrois, 

 15-20 X 2^-3 /x. 



Hah. in foliis vivis Diervillce JloriJce, West Kilbride, Ayrshire 

 (Bo3'd), Sept. Sporulse iis Gl. frigidi Sacc. simillimse. 



361. Myxospoeium coeticolum Edgerton in Annal. Mycol. 

 1908, vi. 48, fig. Sacc. Syll. xxii. 1195. Stevens, p. 546. See 

 Bulletin New York Agric. Expt. Station, nos. 163, 191. 



Pustules erumpent, originating under several layers of cortex, 

 t-2 mm. diam., scattered rather densely over the diseased area, at 

 length blackish. Spores straight or curved, cylindrical, very densely 

 granular, 18-32 x 6-9 /x, oozing out in creamy- white tendrils ; sporo- 

 phores very short, rising from a greenish-yellow parenchymatous 

 stratum. 



On branches of Apple, causing a serious die-back. Long Ashton, 

 Oct.-Feb. (Comm. A. D. Cotton.) 



This disease was first met with in New York State in 1898, where 

 it caused a canker of the bark. It was at first wrongh'- named 

 Macroplioma malorum B. & Y., but it was noted that it was not the 

 same as Diplodia malorum Pckl. (whicli=the Macroplioma), for 

 there is no p3^cnidial wall, while the spores remain always colourless 

 and do not turn brown with age. — Accompanying M. corticolum at 

 Long Ashton is a similar fungus with ovoid spores measuring 

 7-8 X 2 ^. h M. Mali Bres. 



362. Myxospoeium incaexatum Bon. Handb. p. 50. Sacc. 

 Syll. iii. 722 ; Fung. Ital. pi. 1073. Allesch. vii. 520. 



Var. PouMEauEEi Sacc. ihid. pi. 1074. f. Coriii nov. f . 



Pustules scattered or here and there aggregated, small (ujj to 



\ mm. diam.), black, conico-convex, raising the epidermis, which is 



at length pierced at the summit by a minute round hole. Spores 



oblong, rarely ovoid, occasionally curvulous, often regular and equi- 



JouENAL OF BoTi^sY. — Yo-L. 60. [May, 1922.] L 



