1900] BOTRYTIS AND SCLEROTINIA 389 
writer has been able to investigate or obtain full information 
about, as well as from his general study of the species of fungi 
concerned, the conclusions based on the study of the lettuce dis- 
ease are fully substantiated. Three classes may be made of the 
diseases of this nature as follows: (1) diseases where both 
Sclerotinia Libertiana and Botrytis cinerea (vulgaris, etc.) appeared ; 
(2) diseases attributed to Botrytis alone; and (3) diseases attrib- 
uted to Sclerotinia alone. 
II. Diseases attributed to Sclerotinia and Botrytis. 
Asa type of this class, which would include the lettuce dis- 
ease, may be taken the disease of hemp described by Behrens 
and others. 
HEMP DISEASE. 
BIBLIOGRAPHY. 
~ 
- TICHOMIROFF, W. Peziza Kaufmanniana,; eine neue, aus Sclerotium 
Stammende und auf Hanf schmarotzende Becherpilz-Spezies. Bull. 
Soc. Nat. de Moscou.—: 294. 1868. 
‘ HAZSLINSzky, F. Polyactis infestans. Grev. 6:77. 1877. 
DE Bary, A. Ueber einige Sclerotinien und Sclerotinienkrankheiten. 
Bot. Ztg. 44 :378. 1886. 
BEHRENS, J. Ueber das Auftreten des Hanfkrebses in Elsass. Zeitschr. 
f. Pflanzenkrankh. x : 208. 18g1. 
- SORAUER, P, (2) Die Schaden der einheimischen Kulturpflanzen. (Zeitschr. 
f- Pflanzenkrankh, 1: 212. 1 gi 
(4) Hanfkrebs. Pflanzenkrankheiten 289. 
So 2 
on 
6. HiLtNer, L, Einige durch Botrytis cinerea erzeugte Krankheiten. Inaug. 
Diss. 1892. 
7 FRANK, A.B. Sclerotienkrankheit des Hanfes. Die Pilzparasitiren 
Krankheiten der Pflanzen 499. 
A disease very similar to that of the lettuce is described by 
Behrens (4) on hemp. For several successive seasons a stem 
Tot of this plant was observed in Alsace. Affected stems were 
Permeated with large, intercellular filaments, while upon the sur- 
face appeared sclerotia resembling the old form Sclerotium varium. 
In the interior cavity of the stem were also numerous sclerotia. 
Upon Some affected plants a growth of Botrytis cinerea appeared, 
