118 
JOURNAL OE THE ROYAL HORTICULTURAL SOCIETY. 
Here again we may revert to the observations by tbe Rev 
M. J. Berkeley, in tbe fourth volume of tbe Journal, where be 
says that these and similar growths “ are often, if not always, pre¬ 
ceded by honey-dew, whether arising from Aphides or from a 
sugary secretion from the leaves themselves; frequently, too, they 
are accompanied by some species of Coccus , especially in the genus 
Citrus .” And when describing the parasite further on he remarks 
that “there is generally a cellular pellicle spreading over the 
surface of the leaf, from which the mycelium springs immediately, 
hut which sometimes arises from the rooting base of its threads.” 
This would favour the view that the early stages of the fungus at 
least are confined to a parasitism upon the honey-dew. It is. 
peculiarly the case with Capnodium that the black mass separates 
easily and flakes off from the leaf, exhibiting no trace of pene¬ 
trating or attaching itself to the stomata. In some allied genera 
a similar circumstance has been observed. Whether the Capno - 
dium is a true parasite of the leaf or is only an inhabitant of some 
excretion, its action in choking up the stomata, and checking the 
healthy action of the plant, will be the same. A year or two since 
some Oranges and Lemons in a conservatory in the south of Eng¬ 
land were infested with Capnodium citri in a perfect condition, but 
as yet we have heard of no instance in which Capnodium elongatum 
has made its appearance on Yines or Figs in this country, although 
a small species is not uncommon on Cherry-Laurel. 
Part Y. 
[Bead at Meeting of the Scientific Committee, 2nd July, 1578.] 
It will be remembered in this Committee that some six months 
ago I directed its attention to the occurrence of a supposed new 
form of Yine Disease which had appeared in France, particulars of 
which I then promised to present as soon as these were communi¬ 
cated to me by Mons. Maxime Cornu, the learned French 
Mycologist, who had investigated the subject. I am now enabled 
to state his views as published in the “Bulletin de la Societe 
Botanique de France.” Two different parasites are alluded to in 
this paper, the first “ Anthracnose,’! or “canker” (chancre), the 
other Cladosporium. The first of these he describes as follows :— 
“ The vineyards of the Harbonne district have been attacked 
