TWO COFFEE DISEASES. 
167 
Ampkiblistrum of Corda there is said to be such a gelatinous 
medium. In many species of Fusisporium there is something 
of the same kind ; in Alytospcrium as constituted by Link, 
and in some other genera allied to Sporotrichwm. Still, from 
all these there are such manifest points of divergence that no 
one would venture to associate the present species with any of 
them. Hence no other course appeared to be open to us but 
to constitute Pellicularicc Koleroga the type of a new genus, 
allied to those just alluded to, but distinguished therefrom by 
its parasitic habit, sessile, echinulate, globose spores, and the 
freedom with which it separates from the matrix. Whether 
or not mycologists will accept this as a sufficient distinction, 
the present course has not been adopted without much con- 
sideration. 
The fact of an epiphytal fungus, which does not penetrate 
the tissues of the leaf, being so destructive to the foster plant, 
may at first seem strange, until it is remembered that in 
plants with coriaceous leaves all, or nearly all, the stomata are 
confined to the under surface of the leaf. If, therefore, a filmy 
substance like the present fungus overspreads the under surface 
of the leaf, and securely seals up all the stomata, it is but 
reasonable to expect, not only that the leaves should fall, but 
that the plants should suffer injury. In such diseases as that 
which affects the hop, and which is but too well known to hop- 
growers in this country, the chief destructive action lies in the 
closing up of the orifices of the leaf by the woolly coating of 
mycelium produced by the fungus. 
From the similarity of habit and growth in the coffee rot to 
that of the hop mould, and, we may also add, of the vine 
mildew, it is extremely probable that the remedies which have 
been applied in the latter instances with success would be more 
•or less advantageous in the former. It is now generally ad- 
mitted that the application of the flowers of sulphur, by dusting 
•over the leaves, is the most effectual remedy yet discovered for 
hop mould and vine mildew. It should certainly have a fair 
trial also in the case of the “ coffee rot,” and the presumption 
is strongly in its favour. 
We have stated sufficient to show that the coffee plant in 
Mysore and in Ceylon is exposed to considerable danger from 
the two persistent enemies above described. Some plants of 
the Liberian variety were sent out some time since in the hope 
that its apparently stronger constitution would prove im- 
pregnable to the Hemileia. At first they progressed favourably, 
but subsequent information dispelled the hope, for the coffee 
•disease had attacked them also. Unless some remedy is dis- 
covered there is reason to fear that even if the cultivation of 
coffee is continued in these places it will be unremunerative, or. 
