NEW OR NOTEWORTHY FUNai 341 



294. Colletotrtchum: Holci Grrove, comb. iiov. 

 Vermicularia Hold Syd. Hedwig. 1899, p. (137). Sacc. Syll. 



xvi. 894. Allesch. vii. 859. 



Spots fuscous, . scattered, oblong', then including the whole leaf. 

 Pustules amphigenous, scattered or arranged ± in lines, lens-shaped, 

 black, 90-1 20x. 50-60 /i, beset with 12-20 curved bristles; bristles 

 chestnut-brown, eseptate, often bulbous at the base, tapering to a 

 paler point, 80-100 ^ long. Spores fusoid, curved or lunate, some- 

 times subacute at one or both ends, minutely pluriguttulate, 

 20-30 X 3-5 IX. (Tab. 550. f. 16.) 



On fading leaves of Holcus mollis. West Kilbride, Ayrshire 

 (Boyd). Aug. 



This has been called a mere form of " V. Melicce Fckl.," and it 

 might be regarded as a delicate variety of C. Dematium, for the 

 proliferous stratum round which the bristles are arranged is like that 

 of the latter species, but much thinner and paler in all its parts. 



295. COLLETOTRICHUM PETTOLICOLA Grovc, COUlb. nov. 



Vermicularia petioUcola Brun. Sphaerops. Char. 1889, p. 39. 

 Sacc. SylL xiv. 908. ? V. petiolorum Schw. Syn. Amer. Bor. 

 no. 1853. Sacc. Syll. iii. 223, 



Pustules rather densely crowded, covered by the epidermis, then 

 erumpent, globose-conical, at length forming a Hattish disc, 100-200 /.i 

 diain., clothed with numerous very long stiff straight acute eseptate 

 black bristles (up to 380 /z long by 8 ju broad at base). Spores ± 

 fusoid, generally straight, 15-30 x 2.1-3^ yu ; sporophores oblong, 

 obtuse, faintly brownish, 16-20 x 3-4 /i? (Tab. 550. f. 17.) 



On fallen petioles oiAcer Fseudoplatamis. Eastham (Ellis). Nov. 



The structure of the proliferous stratum is very nearly that of 

 G. Dematium {Verm. Dematium Fr.). In the original description of 

 Schweinitz no spores are mentioned, the specimens having probably 

 been sterile ; in these also few spores could be found, and those 

 seemed to be immature. But Brunaud's specimens, while presenting 

 no external characters that could differentiate them from V. petio- 

 lorum., furnished spores resembling those of C. Dematium. No doubt 

 both are merely a variety of that species (var. petioUcola). The 

 bristles, which are dark brown, paler towards the apex, by transmitted 

 light, at fh-st diverge in the usual way as they emerge through the 

 rupture in the epidermis, but afterwards they become very crowded 

 and ± paralleL 



296. Cylindrosporium microspermum Sacc. Mich, ii, 169 ; 

 Syll. iii. 738. Fusidium microspermum Speg. Dec. Myc. p. 120. 



Spots circular, indeterminate, amphigenous, pallid-yellow on both 

 sides. Pustules hypophyllous, covered by the swollen epidermis. 

 Conidia cylindrical, tapering slightly towards the ends, and acute at 

 the tips, hyaline, sometimes slightly curved, 10-15 X 1 /u, at length 

 expelled and forming a snow-white pruinose coating over the affected 

 part. (Tab. 550. f. 15.) 



On living leaves of Saxifrac/a oirpoxiiifoUa, which it kills. 

 Cmach Ardran, Crianlarich, Perthshire (Mr. John 11. Lee), Jvdy 

 1918. Ben Lawers (Boyd). 



