THE THREE FORMS OF LYTHRUM SALICARIA. 183 
I fertilized a considerable number of flowers with pollen, taken by a 
camel’s-hair brush, from both the long and short stamens of their own 
(short-styled) form ; but I did not examine with a lens (as I did in the 
cases in the Tables) whether sufficient pollen had been placed on the 
stigma: only 5 capsules were produced, and these yielded, on an average, 
11-0 seed. 
Table III.—SHORT-STYLED FORM. 
I. IE 
12 flowers fertilized by the shorter | 13 flowers fertilized by the shorter 
stamens of the long-styled. These | stamens of the mid-styled. These 
stamens equal in length the pistil of | stamens equal in length the pistil of 
the short-styled. the short-styled. 
69 56 93 69 
61 88 77 69 
88 112 48 53 
66 All 43 9 
0 62 0 0 
0 100 0 0 
= — 0 
83 per cent. of the flowers yielded 61 per cent. of the flowers yielded 
capsules. Each capsule contained, capsules, Each capsule contained, 
on an average, 81:3 seed. | on an average, 64:6 seed. 
III. IV. 
10 flowersfertilized by thelonger| 10 flowers fertilized by the longer 
stamens of the long-styled. stamens of the mid-styled. 
0 14 0 0 
0 0 0 0 
0 0 0 0 
0 0 0 0 
— 0 — 0 
23 0 
Too sterile for any average. Too sterile for any average. 
“white thread,” and those by the longer stamens of the long-styled form by 
« white silk ;” a flower fertilized in the latter manner would have yielded about 
136 seed, and it may be observed that one such pod is missing, viz., at the bottom 
of compartment 1. Therefore I have hardly any doubt that I fertilized a 
flower marked with “ white thread,” as if it had been marked with “ white silk.” 
With respect to the capsule which yielded 92 seed, in the same column with that 
which yielded 136, I do not know what to think. I endeavoured to prevent 
pollen dropping from an upper to any lower flower, and I tried to remember 
to wipe the pincers carefully after each fertilization ; but in making eighteen 
different crosses, sometimes on windy days, and pestered by bees and flies buzzing 
about, some few errors could hardly be avoided. One day I had to keep a 
third man by me all the time to prevent the bees visiting the uncovered plants, 
for in afew seconds’ time they might have done irreparable mischief. It was 
also extremely difficult to exclude minute Diptera from the net. In 1862 I 
made the great mistake of placing a mid-styled and long-styled under the same 
huge net : in 1863 I avoided this error. 
