366 Marshall Ward. — On a lily-disease , 
On the whole, seedling-plants suffer most, and De Bary comes 
to the conclusion that it is the amount of water in the cells and 
cell-walls which probably determines whether the plant resists 
or succumbs to the attack of the fungus : this, again, possibly 
depends on the conditions of the cellulose. As already 
stated, he found it impossible to infect monocotyledons. 
I have quoted the substance of this paper at some length, 
because it seems to me to throw considerable light on the 
nature of the lily-fungus 1 . 
It is clear that in the development of septa, cross-connec- 
tions, and organs of attachment, the mycelium developed from 
the conidia of the lil y-Botrytis presents some remarkable 
analogies with the mycelium developed from the ascospores of 
Sclerotinia (. Peziza ) Sclerotiorum . In its saprophytic habit, 
moreover, and the ease with which it can be grown on very 
different media, the lil y-Botrytis resembles the Peziza : in its 
parasitism it is more pronounced, but even here it presents 
some resemblances worth noting, especially in its mode of 
destroying the tissues of the host, by means of a soluble ferment. 
Here, however, the resemblances cease. De Bary expressly 
points out that his fungus has no gonidial stage ; it could not 
be cultivated on monocotyledons ; and it is prone to the rapid 
development of sclerotia. The mode of infections is quite 
different, and the lil y-Botrytis easily forms gonidia in cultures. 
Nevertheless, I am driven to conclude that, although I have 
never yet succeeded in growing sclerotia or peziza-cups from 
the Botrytis, it is either a stage in the life-history of a Peziza 
of some kind, or at least its alliance lies in this direction ; and, 
in support of this opinion, I would again insist upon the facts, 
already quoted, that Botrytis cinerea is known to be a gonidial 
form of Peziza Fuckeliana ; and several other forms of Botrytis 
are stages in the life-history of sclerotium-bearing Pezizas, 
though De Bary does not seem to allow the latter statement. 
There are many species, good and bad, of these Pezizas, and it 
1 As I write, Dr. C. von Tubeuf, of Munich, sends me an account of a Botrytis 
parasitic on Abies Douglasii', the conidia measure 9 n by 6 \x (Beitr. zur 
Kenntniss d. Baumkrankheiten, 1888, p. 4). 
