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The double race is as permanent, and in this sense as constant, as any ordinary simple variety, both in external form, and in its intimate hereditary qualities. I have succeeded in discovering some other rich races of twisted plants. My other race is a twisted variety of Viscaria oculata, which is still in cultivation, as it has the very consistent quality of being an annual.
But the large size of the cultures required for the counting of numerous groups of offspring in the adult state has deterred me from making such trials. Recently however, I have discovered a species, Viscaria oculata which allows of counting twisted specimens in the pans, and I may soon be able to obtain proofs of this assertion.
Higher up still, bloomed the rosy viscaria, the yellow leptosiphon, the white colinsia, and the lagurus, whose dusty green bloom contrasted with the glowing colours around it.
The Sweet William or Dianthus barbatus affords another instance; it is very interesting because a twisted race is available, which may produce thousands of instances developed in all imaginable degrees, in a single lot of plants. Viscaria oculata is another instance belonging to the same family. I have found them myself in Holland on Galium verum and G. Aparine.
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