7 seeds, with a maximum of forty-eight in one. Fourteen
flowers were crossed with pollen from another plant, and these produced
twelve capsules, containing on an average 30 seeds, with a maximum in
one of fifty-seven seeds; so that the crossed seeds were to the
self-fertilised from an equal number of capsules as 100 to 72. The
former were also heavier than an equal number of self-fertilised seeds,
in the ratio of 100 to 86. Thus, whether we judge by the number of
capsules produced from an equal number of flowers, or by the average
number of the contained seeds, or the maximum number in any one capsule,
or by their weight, crossing does great good in comparison with
self-fertilisation. The two lots of seeds were sown on the opposite
sides of four pots; but the seedlings were not sufficiently thinned.
Only the tallest plant on each side was measured, when fully grown. The
measurements are given in Table 5/67. In all four pots the crossed
plants flowered first. When the seedlings were only about an inch and a
half in height both lots were equal.
TABLE 5/67. Specularia speculum.
Heights of plants measured in inches.
Column 1: Number (Name) of Pot.
Column 2: Tallest Crossed Plant in each Pot.
Column 3: Tallest Self-fertilised Plant in each Pot.
Pot 1 : 18 : 15 6/8.
Pot 2 : 17 : 19.
Pot 3 : 22 1/8 : 18.
Pot 4 : 20 : 23.
Total : 77.
Pages:
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270