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Darwin, Charles, 1809-1882

"Effects of Cross and Self Fertilisation in the Vegetable Kingdom"


Fagopyrum esculentum.
A legitimately crossed plant flowered from one to two days before any
one of the self-fertilised plants in all three pots.
Zea mays.
In all four pots a crossed plant flowered first.
Phalaris canariensis.
The crossed plants flowered before the self-fertilised in the open
ground, but simultaneously in the pots.
SPECIES OF WHICH THE FIRST PLANTS THAT FLOWERED WERE OF SELF-FERTILISED
PARENTAGE.
Eschscholtzia californica (First Generation).
The crossed plants were at first taller than the self-fertilised, but on
their second growth during the following year the self-fertilised
exceeded the crossed in height, and now they flowered first in three out
of the four pots.
Lupinus luteus.
Although the crossed plants were to the self-fertilised in height as 100
to 82; yet in all three pots the self-fertilised plants flowered first.
Clarkia elegans.
Although the crossed plants were, as in the last case, to the
self-fertilised in height as 100 to 82, yet in the two pots the
self-fertilised flowered first.
Lobelia fulgens (First Generation).
The crossed plants were to the self-fertilised in height only as 100 to
127, and the latter flowered much before the crossed.
Petunia violacea (Third Generation).
The crossed plants were to the self-fertilised in height as 100 to 131,
and in three out of the four pots a self-fertilised plant flowered
first; in the fourth pot simultaneously.


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