50 MISSOURI BOTANICAL GARDEN. 
distinct form with no conidial stage. It is occasionally very 
destructive to species of clover (Trifolium). It is regarded 
by some to be identical with S. Libertiana. 
The utmost confusion exists with regard to S. Libertiana, 
and it is generally associated with Botrytis. However, we 
may accept De Bary’s work as conclusive that the former is 
always distinct and has no conidial stage whatever. In 
Europe it has been reported on a large number of hosts. In 
the United States it is certainly one of the causes of the 
lettuce “drop.” 
S. rhizoides may be taken as an example of a Sclerotinia 
which produces neither conidia nor apothecia. Stout (56), 
in a recent publication, states that in no way has he been able 
to induce germination of the sclerotia. 
MORPHOLOGY. 
As has already been mentioned, the first indication of the 
disease on the pepper is the wilting and subsequent browning 
of the leaves and stems. Later the stems show numerous 
tufts of conidiophores of Botrytis cinerea bursting through 
the bark. Careful examination shows that the conidiophores 
arise from the mycelium which permeates the stem. The 
peduncles of the fruits are also covered with a dark mass of 
conidia. About this time the tissues of the peduncle are so 
weakened that the fruits fall to the ground. Mycelium and 
conidia are present at the point of attachment, but otherwise 
the fruits seem to be quite healthy. However, on opening 
the fruits, a number of flat sclerotia are found filling the in- 
terior. Little mycelium is present. The sclerotia are very 
large; some of them, in fact, being over 1 em. in length and 
half as wide. These were preserved during the winter and 
attempts made to germinate them. 
When the stems, from which the conidiophores of Botrytis 
arise, are cut transversely, a characteristic discoloration of the 
wood is evident. The whole stem, with the exception of a 
narrow peripheral zone of light color, is stained a dark brown. 
Upon cutting longitudinal sections of the diseased stem, the 
