intercross

I know nothing about the self-fertility of Trollius Lecoq 'De la Fecondation' 1862 page 93, Mahonia, and Crinum, in which genera the species intercross largely.

From Effects of Cross and Self Fertilisation in the Vegetable Kingdom by Charles Darwin

In "Cross and Self-Fertilisation," page 156, Darwin quotes the information received from Delpino and referred to in the present letter—namely, that it is the fixed opinion of the Italian gardeners that the varieties do intercross.

From More Letters of Charles Darwin — Volume 2 by Sir Francis Darwin

There is no doubt that these three pheasants, namely, the common, the true ring-necked, and the Japan, intercross, and are becoming blended together in the woods of several parts of England.

From On the Origin of Species by Means of Natural Selection or the Preservation of Favoured Races in the Struggle for Life. (2nd edition) by Charles Darwin

But if, in fact, all hermaphrodites do occasionally intercross, the difference between them and unisexual species is, as far as function is concerned, very small.

From The Origin of Species by means of Natural Selection, 6th Edition by Charles Darwin

It has been said in the case of this plant, as of so many others, that the flowers are fertilised in the bud, and that distinct plants or varieties can never naturally intercross.

From Effects of Cross and Self Fertilisation in the Vegetable Kingdom by Charles Darwin