Page:Mendel's principles of heredity; a defence.pdf/115

Rh of that supposition regarding variability of cultivated plants which has already been expressed.

Among the experimental species there were cultivated plants, such as Aquilegia atropurpurea and canadensis, Dianthus caryophyllus, chinensis, and japonicus, Nicotiana rustica and paniculate, and hybrids between these species lost none of their stability after four or five generations.