A PARASITIC BOTRYTIS ON PEPPER AND LETTUCE. 49 
no-Botrytis type, while Botrytis causes the “drop” only in 
rare instances, on account of its inability to attack vigorous 
plants under normal conditions. 
Ramsey (42), several years later, described a lettuce “drop” 
caused by Botrytis during the fall in one greenhouse and by 
S. Iibertiana in late winter, in a second. The former was 
characterized by a sort of watery decay, followed by the pro- 
duction of conidia, while the latter produced an abundance 
of sclerotia and a loose cottony mycelium. 
In the past year Stevens and Hall (53) attribute the lettuce 
“drop” in North Carolina to S. Libertiana. They were able 
to germinate the sclerotia readily and found that infection 
was brought about by the ascospores as well ‘as by the my- 
celium. Both ascospores and mycelium are comparatively 
short-lived, even under favorable conditions, so that they do 
not, to any great extent, serve as a means of carrying this 
fungus over considerable periods of time. The sclerotia, on 
the other hand, are long-lived and are capable of carrying the 
fungus over unfavorable seasons, so that the ascospores are 
able to produce infection on the next crop of lettuce. Here, 
also, the ascospores are for a short time, at least, saprophyt- 
ically nourished before they infect the plants. Contrary to 
Smith’s observations, the mycelium did not appear abund- 
antly on the soil and was unable to migrate any distance 
through it. No mention whatever is made of the fungus 
Botrytis cinerea. 
Botrytis cinerea has been reported several times in this 
country on greenhouse plants. Atkinson describes and 
figures a Botrytis parasitic on carnations. Halsted (22) re- 
marks that Botrytis, previously nourished on the blossoms, is 
the cause of the decayed patches upon many greenhouse 
plants. Spaulding (52) described carefully the disease on 
chrysanthemums, Euphorbia pulcherrima and Primula 
obconica grandiflora. 
The two best known fungi which may be included under 
the third group are S. Libertiana Fuckel and S. trifoliorum 
Eriks. The latter has always been regarded as an entirely 
