250 MOULDS REFERRED BT AUTHORS TO FUMAGO. 



Carolinam Inferiorem, Gallia, Britannia atque Ilibernia. Scoriae 

 inaxime affinis, 



* Flocci more or less connected by their transparent coat. 



1. Capnodium Fullgo, Berk, and Desm. Mycelio crassiusculo 

 compacto a matrice secernibili ; peridiis floccis proeessibusquo 

 ostioliformibus exasperatis ; sporidiis niinoribus. Gliotriclium 

 Fuligo, Fr., Syst. Myc, vol. iii. p. 379. Dematium Fuligo, 

 Schwein., pro parte. 



On leaves of Uvaria triloba, principally on the upper surface. 

 Ohio; T. G. Lea, Esq. On leaves of various plants, Pennsylvania; 

 L. V. Scliweinitz. (Fig. 2.) 



Forming cloth-like scattered patches which at a certain period 

 of growth are separable from the surface of the leaf on which 

 they grow. Flocci connected with one another by their thick 

 transparent subgelatinous coat, running here and there as in all 

 the species into a continuous cellular stratum, where closely 

 pressed to the matrix. Peridia mostly simple, but sometimes forked 

 or even trifid, lageniform, more or less pointed, rough all over 

 Avith the free ends of the flocci, which are often very tliick where 

 they spring from their surface, and with ostioliform processes 

 which are in fact abortive peridia. Sporidia minute, elliptic, 

 with an occasional septum. Possibly perfectly developed sporidia 

 may not have been seen. This species approaches so near to 

 Scorias in structure that we have placed it in a separate section. 

 It is thicker than the others, and more gelatinous, though look- 

 ing very different from the intricate highly developed Scorias, 

 which is sometimes an inch or more in thickness. 



* * Flocci distinct, peridia more or less branched. 



2. C. Schweinitzii, Berk, and Desm. Velutinum ; floccis sub- 

 cylindricis ; peridiis subsimplicibus elongatis lasvibus ; sporidiis 

 obovatis cellulosis ; cellulis vix constrictis. Dematium Fuligo, 

 Schwein., Car. p. 128 (in part). Cladosporium Fuligo, Schwein., 

 in Hook. Herb. Cladosporium Fumago, Schwein., North Am. 

 Fung. No. 2593 (in part). 



On leaves of herbs. Pennsylvania. L. v. Schweinitz. 



The authentic specimen in Sir W. J. Hookers Herbarium is in 

 a very bad state, but it seems to be quite different from the plant 

 sent by the late Mr. Lea. which is evidently the species of Frie.s 

 from his description : " Fibras monstravit rudes atras subreticu- 

 latas e pluribus conglutinatis, ut videbatur, formatas." The 

 peridia are not rough with flocci or processes, and as far as has 

 been seen are simple, though doubtless occasionally branched 

 (fig. 3). The flocci, too, are far more cylindrical. The spori- 

 dia are different from those of the three following species, which 



