1900] BOTRYTIS AND SCLEROTINIA 403 
Botrytis Douglasit of Tubeuf is without any doubt a form of B. 
cinerea, as the writer has ascertained by examination of the 
original material in cooperation with Dr. von Tubeuf. In Pro- 
fessor Ward’s lily disease the species was thought to be distinct 
from cinerea on account of the large size of the conidia (20-25 X 
1s). The writer has often found the Ordinary species with 
spores as large as 30-15, however, and it would seem from Pro- 
fessor Ward’s figures of the conidiophores that the form must 
be very close to cinerea. In some of these cases, notably that 
of the grape, the Botrytis is referred to Sclerotinia Fuckeliana 
De By,., its supposed Peziza form, which is said to develop from 
sclerotia on affected grapes. This form is unknown to the 
writer, but has been held by De Bary to be the real mature form 
of Botrytis cinerea. Pirotta (N. Giorn. Bot. Ital. 13: 130. 1881) 
has also described Fuckeliana as distinct from Libertiana, but it 
is apparent in almost all cases where B. cinerea is referred to as 
Scl. Fuckeliana that nothing more was observed than the ordinary 
conidial form and possibly sclerotia. Whether or not this is the 
true perfect form of cinerea, it is certain that the connection has 
never been proved directly, and much has been taken for granted 
by various writers upon no foundation whatever. 
IV. Diseases caused by Sclerotinia Libertiana alone. 
Cases are not rare of Sclerotinia Libertiana attacking plants 
When no Botrytis appeared. The cucumber disease already 
described js really one of this sort, as the Botrytis simply 
happened to occur in the same house. The writer has seen 
Water cress and parsley in greenhouses attacked by this species, 
Such cases being not uncommon in the Boston houses where 
these plants are considerably grown. Tomatoes also occasion- 
ally show the same trouble, rotting at the surface of the ground. 
The Peziza form is occasionally found developing from sclerotia 
i the soil in such houses. 
: = Bary (doc. cit.) describes a stem rot of Zinnia, — 
ne other plants caused by this species. It is also not uncom 
Mon upon Helianthus. Dr. O. Kirchner, of Hohenheim, gave 
