146 THE JOUllNAL OF BOTANY 



lateral, very obtusely rounded at both ends, colourless, granular 

 and clouded within, 18-27 X 7-9 ju; sporophores linear-oblong, rather 

 stout, obtuse or sometimes tapering above, about 15 x 2-3 /x. 



On dead twigs of Cornus sihirica. Edgbaston Botanic Gardens. 

 Apr. 



Dr. J. W. Ellis found the var. on Laburnum, ©n which it was 

 recorded by Saccardo, and I have found another form on Frajcinus 

 excelsior at Northfield. with spores about 28-32 X 10 jx. All these 

 differ in external appearance, but the spores are all of the same 

 character. Mr. Boyd has sent me beautiful pinkish specimens, on 

 Carpi iius from Ayrshire, which agree exactly in external appearance 

 with Saccardo's type, but have larger spores, 22-27 X 9-12 /x. It 

 seems that the spores of 31. incarnatum varj^ much ; perhaps a wider 

 accpiaintance will lead to its subdivision into several species, but the 

 variety Roumegueri does not seem to be tenable ; rather should there 

 be varieties Corni, Lahurni, Fraxini, Carpini, etc. 



363. MrxospoKiUii sticticum (Karst.) Grove. JSL. carneum 

 Lib. var. sticticum Karst. Sacc. Syll. iii. 726. 



Pustules scattered, drelliptical, rarely roundish, ^-1 mm. long, soon 

 erumpent by a longitudinal slit, convex, black. Spores ellipsoid, rather 

 acute at the ends, especially below, h^^aline or granular, rarely guttu- 

 late, 9-11 X 2-3 ju; sporophores erect, linear, straight, 20-24 X 2-3 /x. 



On dead twigs of Fraxinits excelsior. Quinton (Ws.). Apr. 



It is misleading to place this as a variety of 3£. carneztm, since it 

 is not erumpent in the same manner, the contents are not pink, the 

 spores are not of similar form or size, and the sporophores are very 

 different in shape. 



364. Trullula (Cesatia) Silphii, n. sp. 



Acervulis subejHdermicis, conico-erumpentibus, ^-^ mm. diam., 

 nigrescentibus, denique globulo succineo coronatis. Sporulis longe 

 catenatis, breviter cylindraceis, utrinque truncatis et obsolete guttue 

 latis, h^^alinis, 5-7 X 2 /x, sporophoris brevibus, stipatis, cylindricis, 

 paliformibus, achrois, rarissime furcatis, 10-12 x 2 /x, e strato paren- 

 chymatico pallide olivaceo oriundis suffultis. (Fig. 13.) 



Mab. in stipitibus emortviis Si Ij^Jiii per/bli a ti, in horto botanico, 

 Edgbaston, Mart. T. Spartii, ut videtur, affinis, at acervulis non 

 " tenuissime membranaceis." 



MYIUOCONIUM. 



Syd. in Annal. Mycol. 1912, x. 448. 



Pustules subcutaneous, rounded or elongated, dehiscing by fissures, 

 more or less erumpent, becoming hard when dry. Spores acrogenous, 

 catenulate, globose, minute, hyaline, soon separating ; sporo^jhores 

 fasciculate, often arranged as in Fenicillium. 



365. Myeioconium Scikpi Syd. I. c. p. 449. Mycoth. Germ, 

 no. 1136 ! M. Scirpicolum Died. Annal. Mycol*. xi. 21. 



Pustules scattered or seriate, roundish or oblong, |-1 mm. long, 

 sometimes confluent, at first flat and completel}^ covered by the 

 darkened epidermis which is afterwards rimosely sj)lit, at length 

 erumpent, when moist cinereous, when dr}^ blackish, somewhat locellate 

 within. Spores very numei'ous, globose, hyaline, 2-2|^ /x diam., formed 

 in chains, but separating; sporophores -h filiform, about 10 X 2 /x. 



