1913] MATHENY—BROWN-ROT FUNGUS 431 
being much slower than the latter (fig. 3). Second, the conidial 
tufts do not agree in size, shape, or color. The S. cinerea when 
grown on plums, pears, apples, and quinces agrees in practically 
every instance with the local Sclerotinia. 
When grown in pure culture, the European S. fructigena never 
agreed with the local form (fig. 5); 300 cultures of each were 
made. The conidia of the former are larger than those of the 
latter. Those of the latter, however, agree in size with the conidia 
of S. cinerea. 
While the asci and ascospores of the European S. fructigena 
and the American form apparently correspond in size, there are 
differences that remain distinct. The ascospores of the former 
are sharply pointed at each end and are free from oil droplets, 
while the ascospores of the latter are rounded at the ends and 
possess oil droplets (fig. 6). No exception was found to this rule. 
he American brown rot of stone fruits is not identical with S. 
fructigena occurring in Europe on pome fruits. It agrees more nearly 
with S. cinerea and should be referred to that species. 
ARK UNIVERSITY 
Wottaeccs Mass. 
LITERATURE CITED 
I. ADERHOLD, R. “5 Uber eine thlick M onilia fi igena Pers. gehorige 
Sclerotinia. Ber. Deutsch. Bot. Gesells. 22: 262-266. 1904 
2. » Die Monilia (Sclerotinia)-Krankheiten unserer Chace und 
rt  Bekimpfung Kaiserl. Biol. Anst. Land und Forst. Flugblatt. no. 14. 


——,, Uber die in den letzten Jahren in Schlesien besonders he 
tictencs Schiden und Krankheiten unserer Obstbiume und ihre Bezie- 
hungen zum Wetter. Bot. Abt. Versuchs. Kénigl. Pomolog. Instjtuts zu 
Proskau. December 1897. 
: Zur M onilia-Epidemie der Kirschbiume. Gartenflora. pp. 429- 

5: ADERHOLD, R., and RUHLAND, W., Zur Kenntnis der SET 
" tinien. Azbeti: “ik: Abt. Land und Forst. Kaiserl. Gesundheitsamte 
. pl. 7. 1905. 
6. ALBERTINI, I. B. pg, and Scuwetniz, L. D. pE, Conspectus ates 
in Lusatiae superioris Agro Niskional Crescentium. No. 1090. 305- 
Lipsiae. 1805. 
