428 BOTANICAL GAZETTE [NOVEMBER 
Conria oF S. cinerea, FROM FRUIT SENT By Dr. G. LusTNER, GEISENHEIM 













No. 
spores Length Mean 
measured 
Ne pn ree ea 13.7 | 14.4 | 15.1 | 1§.8 | 16.6 | 17.21 10 | age 
4.135 24 30 44 34 18 5 5 2 
181 Width 
8.6) 9.4 | 10.2 | 10.8 | 11.5 | 12.2 | 13 13.7 | 14.4 |....|10.86 
7 | 14 31 49 24 25 13 9 9 a 












Number of American brown-rot conidia measured, 042; average size, 14.7X9.9H- 
umber of conidia of S. cinerea measured, 181; average size, 14.4X10.84m. 
Number of conidia of .S. fructig ured, 665; average size, 22.1X1II.2m. 

Asci and ascospores 
Some attention has been given to the size of the asci and asco- 
spores of Sclerotinia fructigena and S. cinerea. In the accompany- 
ing table are given the different measurements that have been made. 










S. fructigena S. cinerea 
AUTHOR 
Asci Ascospore Asci Ascospore 
Aderhold and Ruhland ....| 120-180 Sx-32,% 89 . 3-107 .6 6 es 
x 
9-12 5.6-6.8 | 5.9-6.8 3.1-4.6 
Reade (22) te He Wie sarees 6% 125-215 en nee RR 
x x 
7-10 5-8 
Pollock (20) ...--......... 130-179 TY4-14.4 |. ceed eee eee 
x 
Q.2-11.5 5-7 
Bene 





The following explanation should be given of the above measure- 
ments. The asci and ascospores of S. fructigena measured by 
ADERHOLD and RUHLAND were obtained from mummied apples 
in their experiments at Dahlem. Their S. cinerea material was 
the preserved material sent them by Norton. The measurements 
made by READE were of fresh material sent him by N ORTON. 
PoLLock’s measurements were of fresh material obtained in 
Michigan. 
