442 



SPECIES TO BE TRANSFERRED TO 



COLLETOTRICHUM. 



833. Phoma Janiphae, Sacc. 



COLLETOTRICHUM JaNIPHAE, GtOVC 



Sphaeropsis Jamphae, Thiim. in Flora, 1878, p. 179. 



Macrophoma Janiphae, Berl. & Vogi. in Syll. Addit. p. 307. 



Pustules densely gregarious, very numerous, sub-epidermal, 

 black, paler in the centre, roundish or subangular, nearly flat, 

 usually 150-180 p diarn., each, with a few (20-25) blackish bristles 

 arranged round the periphery or rarely scattered over the disc ; 

 bristles short, curved or straight, tapering slightly upwards, 

 rarely septate, dark olivaceous-brown, 30-40 fx long. Spores 

 oval or oblong, rounded at both ends, with one or more guttules, 



quite hyaline, 10-13 x 4r-5 /xj sporophores erect, fasciculate, 



oblong, cuspidate at apex, pale-brown, 12-14 x 4r-5 p.. (Fig. 



On dead stems of Jatropha Janipha (ManiJtot carthaginensis), 

 Aiken, South Carolina (Thiim. Mycoth. univ. no. 1191 !), legit 



Ravenel. 



mistak 



ly describes, is due to the coloured sporophores and subhy- 

 menium; the black margin is due to the bristles. "When the 

 epidermis is raised in the centre, it shows as a whitish dot on 

 the black pustule, and ultimately bursts at that point. "When 

 the pustule is older, the disc becomes quite pale, but is still 

 surrounded by a narrow black border due to the bristles. 



Roumeguere (Fung. Gall. exs. no. 718 !) issued a similar 

 fungus, from Collioure, in France, which shows pustules of two 



sizes. 



immature 



Colletotrichum, before the bristles are developed or the spores 

 have reached their proper shape and size. But what the smaller 

 are, unless they are the same thing in a still earlier state (as 

 seems probable), I do not care to pronounce: they have spores, 

 some about 5 x 3 /x. as f 1 /p ' C1 - 11 1 A 1 N 



accar 



very 



In a paper, which it is hoped will soon be published in this 

 Bulletin, I have shown that C olletotrichuvi and V ermicularia 

 should be kept as two distinct genera of Melanconiales, separated 

 by the fact that in Vermicularia the bristles are the most con- 

 spicuous part and are often well-developed before the spores 

 appear; while in Colletotrichum the reverse is the case, the 

 bristles being- as it were an afterthought, developed only as the 

 pustule matures, so that fully-formed spores are often plentifully 

 produced before a single bristle can be detected. 



A few other species, listed by Saccardo, may now be more 

 briefly referred to : — 



841. Phoma irregularis, Sacc. 



Sphaeropsis irregularis, Berk. & Curt. Cub. Fung. no. 563. 

 This name should be dropped : the type specimen (Herb. Berk. 



