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They are generally called atavists or reversionists, but even these terms are sometimes used in a different sense. Lastly it is to be said that the empirical and experimental evidence as to the question of constancy is not as extensive as it should be. The experimental conditions are seldom described, and it is only recently that an interest in the matter has been awakened.
Such heads are as completely double as are the brightest heads of the most beautiful double commercial varieties of composites. Real atavists or real reversionists were seen no more after the first purification of the race. I have continued my culture and secured last summer as many and as completely doubled heads as previously. The race has at once become permanent and constant.
To the many instances given by him of such alternative inheritance, the monochromatic reversionists of the striped varieties are to be added as a new type.
Obviously every gardener would select the seeds of the brightest crests, but with care the full crests may be recovered, even from the worst reversionists in two or three generations. It is a double race of quite the same constitution as the twisted teasels. My second point is a direct proof of this assertion, but made with a fasciated variety of a wild species.
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