Oct., 1923] 
STOUT — STUDIES OF LYTHRUM SALICARIA 
443 
Table i. Self-compatibility in Lythrum Salicaria to insect-pollination , and cases typical for 
the results obtained for controlled hand-pollinations 
Number of Flowers 
Pollinated 
Number of Pods 
Produced 
l Number of Pods used 
in Seed Counts 
Distribution of Seed per Pod. Class Groups i_to"io 
Average Seed for 
Pods with Seed 
0 
0 
7 
0 
cs 
1 
0 
? 
O 
O 
y> 
0 
O 
tp 
0 
00 
1 
0 
a 
T 
0 
0 
7 
0 
O 
e* 
0 
ro 
Isolation, Insect- 
pollination 
S. no. 1 . 
S. no. 2. (1918). . . 
S. no. 2. (1919).. . 
L. no. 1 . 
L. no. 2 . 
M. no. 2 . 
M ,;® o dSSe'! 
^ 9 9 ) [lower $. 
? 
? 
? 
? 
? 
? 
? 
? 
? 
0 
17 
l6l 
65 
53 
3000 
many 
few 
few 
17 
100 
65 
53 
300 
7 i 
3 i 
40 
10 
0 
16 
3 
14 
7 
3 
6 
7 
34 
47 
47 
202 
43 
16 
20 
30 
2 
3 
48 
12 
3 
3 
16 
8 
3 
0 
1 
4 
7 
2 
3 
2 
5 
6 
1 
2 
2 
4 
1 
0 
1 
0 
0 
5 
2 
2 
1 
2 
1 
0 
0 
1 
I 
I 
I 
O 
0 
2 
1 
0 
1 
0 
2 
0 
2 
2 
3 
1 
1 
I 
3.28 
23.67 
2.96 
4.85 
8.91 
“ total. 
? 
1500 
142 
16 
79 
18 
4 
7 
5 
1 
5 
1 
I 
1 
2 
2 
18.25 
Hand-pollination 
M. no. 1. (1919). . 
233 
134 
134 
1 
28 
29 
19 
20 
14 
6 
5 
8 
3 
0 
0 
1 
24.61 
M. 5-1 no. 13. 
103 
0 
M. 3 no. 7. 
48 
8 
8 
1 
5 
2 
7.00 
M. 1 no. 48. 
35 
6 
6 
0 
1 
2 
2 
1 
20.33 
M. 1 no. 31. 
33 
4 
4 
0 
0 
2 
1 
1 
25.OO 
M. 1 no. 56. 
60 
9 
9 
0 
0 
4 
3 
0 
1 
1 
28.33 
M. 5-1 no. 25. 
32 
9 
9 
0 
0 
0 
2 
1 
0 
3 
2 
1 
50.88 
M. 5-1 no. 35. 
32 
5 
5 
0 
0 
1 
1 
0 
0 
2 
0 
0 
1 
49.50 
M. 1 no. 30. 
37 
9 
9 
0 
0 
0 
2 
0 
2 
1 
1 
0 
1 
2 
59-66 
M. 1 no. 57. 
40 
44 
44 
0 
1 
7 
3 
2 
7 
3 
3 
12 
5 
1 
63.15 
L. 4 no. 2. 
55 
2 
2 
0 
2 
6.00 
L. 1 no. 66. 
68 
2 
2 
0 
2 
6.00 
L. 2 no. 18. 
50 
7 
7 
0 
6 
1 
742 
L. 1 no. 8. 
49 
22 
22 
0 
11 
10 
1 
8.90 
L. 5-5 no. 38. 
24 
6 
6 
0 
2 
1 
2 
1 
20.00 
S. 5 no. 5 . 
14 
4 
4 
0 
1 
2 
1 
14.00 
capsules that could be referred definitely to differences in insect visitations 
or to the constitution of the plants. 
Mid-styled Plants Grown in Isolation. A plant of this form (M no. 2) 
was sent to Mr. H. L. Skavlem, who grew it at Carcajou Point, Lake 
Koshkonong, Wisconsin. Mr. Skavlem states that by the middle of July 
this plant was “over four feet high with an abundance of bloom which con¬ 
tinued for about six weeks.” The plant bloomed from July 14, 1918, until 
the first week in September. There were about 35 well-developed main 
flower spikes ranging from 3 to 14 inches in length, and the total number 
of flowers produced was estimated at 8,000. This description would apply 
as well to any well-developed plant of any of the three forms. 
This mid-styled plant was decidedly self-compatible in this isolation 
test. At least 3,000 capsules matured on it in 1917. A total of 300 cap¬ 
sules were examined and counts were made of the seeds present, with 
