1915] BARTLETT—MUTATION IN OENOTHERA I05 
Data in regard to the frequency of mut. mummudlaria in all 
the strains of O. pratincola except Lexington E are given in tables 
II-XI, and are summarized in table XII. Lexington E yielded 
striking mutations in both F, and F, generations, but they con- 
stituted an entirely different series of forms from those which were 
obtained from the other strains. In several respects the mutation 
phenomena presented by Lexington E were unique. It will be 
necessary, therefore, to defer an account of this strain until next 
year. 
It will be noticed from the tables that a large number of seeds 
were planted capsule by capsule. The variation in number of 
seeds per capsule appears greater than it should, for in many 
cases the capsules had dehisced and lost part of their contents. In 
general, a capsule of O. pratincola contains 200-300 seeds. 
TABLE II 
ANALYsIS OF F; SEEDLING CULTURES OF ‘‘LEXINGTON C” 
Culture planted Total plants} Typical Mut. nummuloria candle lie 
Se Sag eee ae 1000 720 711 4 is POs 535 5 
and 21 1) 
Ee eae pa eae eh 33° IOI 93 se : 
Ftp rh aaa ed 130* +17 116 ° - 
fot aN atone nie Tr0* XII 106 ° 5 
Perey iy copes 88* 21 20 ° 
(OER sas 125 20 20 ° . 
Bangi er ee 162* 152 149 ° 3 
Dee oe epee 164 143 140 9 3 
ad ae 237* 172 165 ° 7 
1b GE gt ae on 237* 223 211 1 (no. 123) II 
Re cr eh 65* 35 35 o e 
Ln ay loa nie enn 217* 147 143 i (no. 136) 3 
MOS, eis ss 200 156 153 si : 
Se 2 154 152 . : 
i 147* 06 8.1 8 : 
RF eet 200 58 e : 
0 ee 200 155 152 2 (nos. 150 and i 
151 
fc gh Ret Og ee 200 98 95 e - 
We ee 200 130 124 2 (nos. 156 and 
I 
See 200 112 109 1 (no. 162) : 
fT ea 4,221 2,923 2,845 1 
* Indicates seeds from the same capsule. 
