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.
25. SOLANACEAE. Petunia violacea.
DINGY PURPLE VARIETY.
The flowers of this plant are so seldom visited during the day by
insects in this country, that I have never seen an instance; but my
gardener, on whom I can rely, once saw some humble-bees at work. Mr.
Meehan says, that in the United States bees bore through the corolla for
the nectar, and adds that their "fertilisation is carried on by
night-moths." (6/1. 'Proceedings of the Academy of Natural Science of
Philadelphia' August 2, 1870 page 90.)
In France M. Naudin, after castrating a large number of flowers whilst
in bud, left them exposed to the visits of insects, and about a quarter
produced capsules (6/2.
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