46 MISSOURI BOTANICAL GARDEN. 
both cases the disease was attributed to Botrytis, no sclerotia 
appearing on the plants. It would seem that we have a case 
where both forms, Botrytis and S. Libertiana, are associated, 
but entirely distinct. 
In a like manner Frank (18) noticed a disease of rape, and 
found both Botrytis cinerea and Sclerotinia Libertiana pres- 
ent, consequently concluding that the two stages were of the 
same fungus. De Bary, however, discredited Frank’s con- 
clusion as to the connection of the two stages. It appears 
that, like the disease of hemp, we have the two fungi as- 
sociated, though distinct. 
Again, in a rotting of the stems of the potato in various 
parts of Europe, the same confusion exists. After reviewing 
the literature on this subject the identical conclusions were 
reached; that is, the two forms, Botrytis and Sclerotinia 
Libertiana, although causing the same symptons and gener- 
ally associated, are always distinct forms. 
In Holland the confusion of the different forms is still 
greater, as a separate species is made for every new host. 
However, here again the two forms stand out distinct. They 
are associated on the same host, causing a widespread disease 
of the tulip and other bulbous plants. The Botrytis, which 
is not typical B. cinerea on account of the short branching 
conidiophores which it produces, is known as B. parasitica 
Cav., while the sclerotia, ascribed to S. bulborum Wak., 
resemble S. Libertiana. 
Other epidemics, in Europe, of some magnitude have been 
ascribed to attacks by Botrytis on a number of fruits, 
vegetables and greenhouse plants resulting, in most cases, in 
a complete rotting and collapse of the host. 
A number of diseases caused by Botrytis alone have been 
reported from Europe at various times, the lily disease in 
England, observed by Ward (66), is one of the best known 
examples. The Botrytis attacking the lily, while not typical 
B. cinerea, is at least of the B. cinerea type. Kissling (31), 
in the same year, reported at length on Botrytis as a parasite 
on Gentiana lutea, the horse chestnut and a number of green- 
house plants. 
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