286 THE JOITRNAL OF BOTANT 



distichis, obovoideis, uniseptatis, leviter constrictis, 7-10 x 2|-3 /x 

 (ut pluviuiuiii 8 jx longis), hvalinis, eguttulatis, loculo inferiore angus- 

 tiore. (Tab. 5.50, f. i.) 



Hah. in foliis aridis eraortuis hunii jacentibus Cydonice vulgaris, 

 Hereford, vere, 1917-18 (Maio, etc.). 



The ])erithecia are confined to the lower surface, and, though they 

 are sometimes concealed amidst the tomentum, more often the part 

 occupied by them is nearly glabrous. In the winter the perithecia are 

 to be found, but spore-less : the asci mature as summer approaches. 

 On pressure, the group of asci emerges from the perithecium as a 

 globular fasciculate coherent cluster, consisting of 200 or more, and 

 reminding one strongly of those of Sphceridina ahhreiuata on Rnhus. 

 The texture of the perithecial wall is unusually loose and irregular. 

 This species is near to SphcereUa Pomacearum Sacc, but differs from 

 the insufficient description of that in several important particulars. 



254<. Leptospk.i^rta Galiokfm Sacc. Syll. ii. 22. 

 f. Dipsaci. 



Peritheciis su1)gregariis, tectis, globuloso-depressis, nigris, \-\ mm. 

 lat., ostiolo papillato erumpente ; ascis clavatis, longiuscule stipitatis, 

 90x14/1 (part, sporif.), paraphysatis, 8-sporis ; paraphysibus clavu- 

 latis, crassis, hvalinis, minute guttulatis, subseptatis, insequalibus ; 

 sporidiis oblique monostichis v. subdistichis, oblongo-fusoideis, obtusis, 

 sa3pe curvulis, initio luteis, grosse biguttulatis, dein triseptatis, brun- 

 neis, subopicis, 21-23 x .5^-0.7 fi, ad septa vix v. perparum constrictis. 

 (Tab. 5.50. f. 2,) 



Hah. in caulibus emortuis Dipsaci siluestris, Salwai'pe, prope 

 Droitwich, Julio. 



255. Nectria Magnusiana Rehm, Ascom, no. 436. Sacc. Syll. 

 ii. 486. 



Status conidicus ( TremeJla aurantiaca') : — Sporodochia densely 

 crowded (20-40 together in one disc), angular by mutual com])ression, 

 surface at first convex, then depressed, wrinkled or umbilicate, soft, 

 outside reddish-brown, disc orange-scarlet, ^-^ mm. diani. Spores 

 allantoid, 5-6 x 1 p, very numerous ; sporophores long, about the 

 same width, many times fasciculately branched. 



Parasitic on the disc of the tubercles of DiatryprJla favacea 

 C. & DN., on branches of Betnla alha, from a dead trunk lying on 

 the ground in Gt. Earr Park (St.), May. 



The shape of an average sporodochium would be well i-epresented 

 by a model of a human molar tooth. Although the fungus was very 

 abundi\nt, more than six feet of the branches of the host being 

 occupied by the many tubercles of the DiatrypeUa and nearly every 

 tubercle being covered and almost obliterated by the TremelJa, yet 

 not a single ascophore of the Nectria could be found. Nevertheless 

 there can be no doubt of the identity of the fungus. 



256. Hypoderma Desmazieri Duby, Hyster. p. 42, pi. 2, f. 22. 

 Sacc. Syll. ii. 786. 



Peritiieeia amphigenous, but mostly epiphyllous, scattered in long 



