TLDR
Petunia violacea, crossed and self-fertilised plants compared for four
generations.
Effects of a cross with a fresh stock.
Uniform colour of the flowers on the self-fertilised plants of the
fourth generation.
Nicotiana tabacum, crossed and self-fertilised plants of equal height.
Great effects of a cross with a distinct sub-variety on the height, but
not on the fertility, of the offspring.
Cyclamen persicum, crossed seedlings greatly superior to the self-fertilised.
Anagallis collina.
Primula veris.
Equal-styled variety of Primula veris, fertility of, greatly increased
by a cross with a fresh stock.
Fagopyrum esculentum.
Beta vulgaris.
Canna warscewiczi, crossed and self-fertilised plants of equal height.
Zea mays.
Phalaris canariensis.via the TL;DR App
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Written by charlesdarwin | On the Origin of Species By Means of Natural Selection
