184 MR. ©. DARWIN ON THE SEXUAL RELATIONS OF 
Table III.—SHorT-STYLED FORM (continued). 
V. VI. 
10 flowers fertilized by own longer | 10flowers fertilized by own shorter 
stamens. stamens. 
0 0 64?* 0 
0 0 0 0 
0 0 0 0 
— 0 — 0 
0 0 21 0 
0 9 
Too sterile for any average. Too sterile for any average. 
I fertilized a number of flowers without particular care with their own 
two pollens, but they did not produce a single capsule; the position of 
the stigma within the calyx renders the fertilization without some care 
difficult. 
Summary of the three preceding Tables. 
Long-styled form.—Twenty-six flowers fertilized by the stamens 
of corresponding length, borne by the mid- and short-styled forms, 
yielded 61:5 per cent. of capsules, which contained, on an average, 
89:7 seed. 
Twenty-six flowers fertilized by the other and shorter stamens 
of the mid- and short-styled forms yielded only two very poor 
capsules. 
Thirty flowers fertilized by this form's own two sets of stamens 
yielded only eight very poor capsules; but flowers well fertilized 
by bees by one or both of their own kinds of pollen produced 
numerous capsules containing, on an average, 21:5 seed. 
Short-styled form.—Twenty-five flowers fertilized by the stamens 
of corresponding length, borne by the long- and mid-styled forms, 
yielded 72 per cent. of capsules, which (excluding one capsule 
with only nine seeds) contained, on an average, 70:8 seed. 
Twenty flowers fertilized by the longer stamens of the long- 
and mid-styled forms yielded only two very poor capsules. 
Twenty flowers fertilized by both their own two sets of stamens 
yielded only two poor (or perhaps three) capsules. 
Mid-styled form.—Twenty-four flowers fertilized by the stamens 
of corresponding length, borne by the long- and short-styled 
forms, yielded 96 (probably 100) per cent. of capsules, which con- 
* I suspect that, by mistake, I fertilized this flower with the pollen of the 
shorter stamens of the long-styled form, and it would then have yielded about 
64 seed. Flowers to be thus fertilized were marked with black silk; those with 
the pollen of the shorter stamens of the short-styled with black thread ; and thus, 
I suspect, the mistake arose. . 
