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Darwin, Charles, 1809-1882

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


Iberis umbellata.
In both pots a crossed plant flowered first.
Eschscholtzia californica.
Plants derived from the Brazilian stock crossed by the English stock
flowered in five out of the nine pots first; in four of them a
self-fertilised plant flowered first; and not in one pot did an
intercrossed plant of the old stock flower first.
Viola tricolor.
A crossed plant in five out of the six pots flowered before any one of
the self-fertilised.
Dianthus caryophyllus (First Generation).
In two large beds of plants, four of the crossed plants flowered before
any one of the self-fertilised.
Dianthus caryophyllus (Second Generation).
In both pots a crossed plant flowered first.
Dianthus caryophyllus (Third Generation).
In three out of the four pots a crossed plant flowered first; yet the
crossed were to the self-fertilised in height only as 100 to 99, but in
weight as 100 to 49.
Dianthus caryophyllus.
Plants derived from a cross with a fresh stock, and the intercrossed
plants of the old stock, both flowered before the self-fertilised in
nine out of the ten pots.
Hibiscus africanus.
In three out of the four pots a crossed plant flowered before any one of
the self-fertilised; yet the latter were to the crossed in height as 109
to 100.
Tropaeolum minus.
A crossed plant flowered before any one of the self-fertilised in three
out of the four pots, and simultaneously in the fourth pot.


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