...A hybrid, raised by Knight from the sweet almond by the pollen of the peach, produced flowers with little or no pollen, yet bore fruit, having been apparently fertilised by a neighbouring nectarine... 
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...Another hybrid from a sweet almond by the pollen of a nectarine produced during the first three years imperfect blossoms, but afterwards perfect flowers with an abundance of pollen...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...Most of the varieties both of the peach and nectarine reproduce themselves truly by seed...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...De Candolle does not appear perfectly assured of their specific identity; and an eminent botanist has quite recently maintained that the nectarine "probably constitutes a distinct species...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...Hence it may be worth while to give all the evidence on the origin of the nectarine...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...It is asserted that the Boston nectarine was produced from a peach-stone, and this nectarine reproduced itself by seed...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...Rivers states that from stones of three distinct varieties of the peach he raised three varieties of nectarine; and in one of these cases no nectarine grew near the parent peach-tree...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...Peter Collinson in 1741 recorded the first case of a peach-tree producing a nectarine, and in 1766 he added two other instances...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...One of the peaches was almost as smooth on one side as a nectarine...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...At Beccles a Royal George peach produced a fruit, "three parts of it being peach and one part nectarine, quite distinct in appearance as well as in flavour...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...In 1844 a Vanguard peach-tree produced, in the midst of its ordinary fruit, a single red Roman nectarine...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...Now it is known that when a bud on a peach-tree has once borne a nectarine the same branch has in several instances gone on during successive years producing nectarines...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...Hence we may confidently accept the common view that the nectarine is a variety of the peach, which may be produced either by bud-variation or from seed...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...The varieties of the peach and nectarine run in parallel lines...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...In all these differences we see the closest analogy with the varieties of the peach and nectarine...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...We have seen that no less than six named and several unnamed varieties of the peach have thus produced several varieties of nectarine...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
... The peach and nectarine do not succeed equally well in the same soil: see Lindley's 'Horticulture,' p...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
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