296 
Journal of Agricultural Research 
Vol. V, No. 7 
as exhibited by ginseng roots. The check plants remained healthy. 
Plate XXIX, figure 2, is a reproduction of a photograph of two of the 
inoculated and one check rhizome. Reisolations were made, and the 
fungus which was obtained resembled the original culture isolated from 
ginseng. 
Comparison with type specimen. —To determine further the rela¬ 
tionship of the Sclerotinia sp. from ginseng to that on Smilacina spp., an 
examination was made of the type specimen of Sclerotinia smilacina 
Durand, deposited by Dr. Durand in the herbarium of the botany depart¬ 
ment of Cornell University. The specimens showed the black coloration 
as exhibited by the inoculated rhizomes of Smilacina racemosa as well as 
the ginseng roots. 
Apothecia on ginseng are rare, and though attempts to produce them 
were made no success can be reported up to the present time. It is of 
interest, however, to compare the measurements as given in the original 
descriptions by Durand (1902, p. 462-463) and Rankin (1912) as shown 
in the following table: 
Species. 
Sclerotia. 
Apothecia. 
Asd. 
Ascospores. 
Gm. 
Gm. 
fi 
Sclerotinia smilacina. . 
0.1 by 0*2 to 2. 
0.7s to 3. . 
120 to 140 by 6 
to 8. 
12 to 15 by 4 to 
5 - 
Sclerotinia panacis . .. . 
0.3 to 1. 
1.51x52.5.. 
125 to 137.5 t>y 
6.4 to 6.5. 
11.7 to 16 by 4.8 
to 7.5. 
Measurements made by the writer from the type material of these 
species have shown that the asci and ascospores are not to be distinguished 
either in form or size and agree with the measurements given above. 
CONCLUSIONS 
1. (A) The pathogenicity of Sclerotinia sp. causing the white-rot of 
ginseng has been established. (B) This species of Sclerotinia is identical 
with the Sclerotinia libertiana Fuckel occurring on lettuce, celery, and a 
number af other hosts. 
2. (A) The pathogenicity of Sclerotinia sp. causing the black-rot of 
ginseng has been established. (B) A consideration of the following facts 
indicates that Sclerotinia panacis Rankin is identical with Sclerotinia 
smilacina Durand: (a) Inoculations with a species of Sclerotinia from 
ginseng on Smilacina racemosa gave positive results, (b) Measurements 
of asci and spores made by the writer from the type material of both 
species agree. There is a close agreement in all distinguishing characters, 
.as given in the original description of the two species, (c) The lesions 
produced by the inoculations are similar on the two hosts and identical 
with those on diseased plants as they occur naturally. 
