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tables, he thinks that the following statements are fairly well established. The whole subject, however, treated as it necessarily here is with much brevity, is rather perplexing, and allusions cannot be avoided to the "struggle for existence," "divergence of character," and other questions, hereafter to be discussed. |
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Candolle and others have shown that plants which have very wide ranges generally present varieties; and this might have been expected, as they
exposed to diverse physical conditions, and as they come into competition (which, as we shall hereafter see, is
→an equally or
more important circumstance) with different sets of organic beings. But my tables further show that, in any limited country, the species which are
common, that is abound most in individuals, and the species which are most widely diffused within their own country (and this is a different consideration from wide range, and to a certain extent from commonness),
give rise to varieties sufficiently well-marked to have been recorded in botanical works. Hence it is the most flourishing, or, as they may be called, the dominant
which range
the
→OMIT
most diffused in their own country, and are the most numerous in
oftenest produce well-marked varieties, or, as I consider them, incipient species. And this, perhaps, might have been anticipated; for, as varieties, in order to become in any degree permanent, necessarily have to struggle with the other inhabitants of the country, the species which are already dominant will be the most likely to yield
which, though in some slight degree modified,
still inherit those advantages that enabled their parents to become dominant over their compatriots. In these remarks on predominance, it should be understood that reference is made only to
forms which come into competition with each other, and more especially to the members of the same genus or class having nearly similar habits of life. With respect to
the number of individuals
→or commonness of
species, the comparison of course relates only to the members of the same group.
→One of the higher
may be said to be dominant if it be more numerous in individuals and more widely diffused than the other plants of the same country,
→which live under nearly the same conditions.
→A plant of this kind
is not the less dominant
→OMIT
because some conferva inhabiting the water or some parasitic fungus is infinitely more numerous in
and more widely
→But if the
or parasitic fungus
its allies in the above respects, it
→will then be dominant
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