401 
large, usually oval, often reaching 40,; the peridial cells form a 
thin tenacious membrane and do not readily separate from one 
another when placed in dilute potash; their ends are usually 
rounded, but are sometimes obliquely truncate, imbricate or occa- 
sionally in rows placed end to end; they are somewhat interme- 
diate in this respect between our other two species. 
Exsicc. Ellis & Everhart. N. A. Fungi, 2222; Seymour & Earle, 
Economic Fungi, 223. 
The above species has been confused with P. fini. Wallroth 
was the first to distinguish it as a foliicolous variety, while Fuckel 
made ita distinct species, Unless we are to recognize only one 
pine-inhabiting Peridermium which is clearly illogical, we must 
maintain this as a distinct species. If we are to follow in the lead 
of some of the highly imaginative fungiculturists, some of whom 
maintain that this form is the aecidial stage of a Cronartinm, while 
P. pini is similarly regarded as the corresponding stage of a Coleo- 
Sporium, the two must beat least specifically distinct, since in their 
mature stage they would belong to two totally different genera! 
Winter singularly unites them in one species without even main- 
taining a varietal distinction. 
2, PERIDERMIUM ORIENTALE Cooke, Indian Forester, 3: 91. 
With some hesitation we refer the large leaf-inhabiting species 
of the Southern States to this name, originally described from 
northern India. In this we are supported by three somewhat 
questionable principles: (1) A writer is supposed to know his own 
Species (a principle, however, which does not always follow) and 
the specimens issued in Ravenel’s Fungi Amer., cited below, were 
doubtless examined by Cooke, who was the author of the species 
in question ; (2) There is little in the description of the species as 
quoted in Saccardo that would stand in the way of such a refer- 
€nce; and (3) The species has commonly been referred to this 
name by American authors. While, therefore, it seems hardly 
Probable that there should be a species of Peridermium common 
to two such remote localities as India and the southern United 
States, and while the original specimen may, in the light of char- 
acters now recognized that are not touched upon in the original 
