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370 BOTANICAL GAZETTE [JUNE 
Botrytis cinerea has been considered the conidial form of Sclero- 
tinia Fuckeliana, and the existence of any such conidial form of 
S. Libertiana has been denied. Some investigators have disputed 
this, however, claiming that in certain cases Botrytis cinerea has 
developed in undoubted connection with Sclerotinia Libertiana, 
thus casting doubts on the distinctness of S. Fuckeliana. The 
present article contains a description of the investigation of the 
above mentioned lettuce disease, in so far as it bears on this 
subject, together with some other observations made by the 
writer, and abstracts of descriptions of several similar diseases 
investigated by others. 
1. The lettuce disease. 
BIBLIOGRAPHY. 
1. HUMPHREY, J. E. The rotting of lettuce. Rept. Mass. State Exp. Sta. 
2. JONES, L. R. (a) Lettuce mildew and lettuce rot. Rept. Vt. Exp. Sta. 
(4) Lettuce rots. Rept. Vt. Exp. Sta. 6:84. as 
TaFT, L. R. Lettuce mildew. Am. Gard. 15: ‘ 
. GaLLoway, B. T. The growth of ps as tel “6 the physical 
properties of thefsoil. Agrl. Science 8: 302. 1894. 
5. PAMMEL, L. H. Diseases of lettuce and radishes. Am. Gard. 16: 150. 
1895. 
6. BaiLey, L. H. Lettuce. Bull. Cornell Univ. Exp. Sta. 96 : 387. 1895. 
- HALSTED, B. D. Some of the more injurious fungi upon market-garden 
crops: Lettuce. Rept. N. J. Agr]. Coll. Exp. Sta. 7: 349. 1895. 
D. Lettuce rot. Bull. Ohio Exp. Sta. 73 : 221. 1896. 
. Stone, G. E., and Smiru, R. E. (a) “Drop” of lettuce. Rept. Hatch 
Exp. Sta. Mass, Agrl. Coll., 9:79. 1897. 
(6) The “drop” of lettuce. Rept. Hatch Exp. Sta. Mass. Agrl, 
Coll. 10:55. 1898. 
(c) Further considerations in regard to the ‘“‘drop”’ in lettuce. Rept’ 
Hatch Exp. Sta. Mass. Agrl. Coll. 11: 149. 1899 
o. Kinney, L. F. Garden lettuce and its cultivation. Rept. R. I. Exp. 
Sta. 10: 270. 1898. 
- GARMAN, H. A method of avoiding lettuce rot. Bull. Ky. Exp. St@ 
81:3. 1899. 
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In the Report of the Massachusetts Experiment Station for 
