Eighteen
capsules, produced by cross-fertilisation, contained on an average
eighty-five seeds, whilst fourteen capsules from self-fertilised flowers
contained on an average only nine seeds; that is, as 100 to 11: 'Jahrb.
fur Wissen Botanik.' B. 7 page 467.) If we take into account of the fact
that a much greater proportion of flowers produced capsules when crossed
than when self-fertilised, the relative fertility of the crossed to the
self-fertilised flowers was as 100 to 52. Nevertheless these plants,
whilst still protected by the net, spontaneously produced a considerable
number of self-fertilised capsules.
The seeds of the two lots after germinating on sand were planted in
pairs on the opposite sides of four large pots. At first there was no
difference in their growth, but ultimately the crossed seedlings
exceeded the self-fertilised considerably in height, as shown in Table
4/34. But I believe from the cases which follow that this result was
accidental, owing to only a few plants having been measured, and to one
of the self-fertilised plants having grown only to a height of 15
inches. The plants had been kept in the greenhouse, and from being drawn
up to the light had to be tied to sticks in this and the following
trials. They were measured to the summits of their flower-stems.
TABLE 4/34. Eschscholtzia californica.
Heights of Plants to the summits of their flower-stems measured in inches.
Pages:
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177