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Darwin, Charles, 1809-1882

"The Different Forms of Flowers on Plants of the Same Species"


PLANT 29.
This long-styled plant was legitimately fertilised during the unfavourable
season of 1864, in the manner described under Number 26, and yielded an average,
from ten capsules, of 84.6 seeds, with a maximum of 132 and a minimum of 47,
thus attaining to 91 per cent of the normal fertility. During the highly
favourable season of 1866, when fertilised in the manner described under Number
26, it yielded an average, from nine capsules (one poor capsule having been
excluded), of 100 seeds, with a maximum of 121 and a minimum of 77. This plant
thus exceeded the normal standard, and produced 107 per cent of seeds. In both
sets of anthers there were a good many bad and shrivelled pollen-grains, but not
so many as in the last-described plant.
Plant 30.
This long-styled plant was legitimately fertilised during 1866 in the manner
described under Number 26, and yielded an average, from eight capsules, of 94
seeds, with a maximum of 106 and a minimum of 66; so that it exceeded the normal
standard, yielding 101 per cent of seeds.
Plant 31.
Some flowers on this long-styled plant were artificially and legitimately
fertilised by one of its brother illegitimate mid-styled plants; and five
capsules yielded an average of 90.6 seeds, with a maximum of 97 and a minimum of
79. Hence, as far as can be judged from so few capsules, this plant attained,
under these favourable circumstances, 98 per cent of the normal standard.


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