See page in:
1859
1860
1861
1866
1869
1872

Compare with:
1859
1861
1866
1869
1872

it be advantageous, 1859 1860 1861 1866
so, 1869 1872

differences both in the internal and external structure of the seeds, which are not always correlated with any differences in the 1859 1860 1861
differences in the 1866
seeds, it seems impossible that their differences in shape, which are not always correlated with any difference in the 1869 1872

flowers, it seems impossible that they 1859 1860 1861 1866
corolla, 1869 1872

advantageous to the plant: 1859 1860 1861 1866
beneficial: 1869
beneficial; 1872

in some cases, according to Tausch, 1859 1860 1861 1866
sometimes 1869 1872

we see that 1859 1860 1861 1866
as before remarked, we see that 1869
OMIT 1872

correlated growth, and 1859 1860 1861 1866
variation and correlation, 1869 1872

correlated in some necessary manner. 1859 1860 1861 1866 1869
in some necessary manner correlated. 1872

1 blocks not present in 1859 1860 1861 1866; present in 1869 1872
Some correlations are apparently due to the manner in which natural selection acts.

I do not doubt that some apparent 1859 1860
some 1861 1866

fact that seeds could not gradually become 1859 1860 1861 1866
impossibility of seeds gradually becoming 1869 1872

except in fruits which opened; so that the individual plants producing 1859 1860 1861 1866
unless the capsules first opened themselves; for in this case alone could the 1869
unless the capsules were open: for in this case alone could the 1872

and if it be advantageous, natural selection may have come into play. But
with respect
in regard
to the differences both in the internal and external structure of the seeds, which are not always correlated with any differences in the flowers, it seems impossible that they can be in any way advantageous to the plant: yet in the Umbelliferæ these differences are of such apparent
importance —
importance—
the seeds being in some cases, according to Tausch, orthospermous in the exterior flowers and cœlospermous in the central
flowers, —
flowers,—
that the elder De Candolle founded his main divisions
in
of
the order on
such characters.
analogous differences.
Hence,
Hence
we see that modifications of structure, viewed by systematists as of high value, may be wholly due to
the
unknown
laws of correlated growth, and without being, as far as we can
judge,
see,
of the slightest service to the species.
We may often falsely attribute to
correlated
correlation
of growth
variation
of growth,
structures which are common to whole groups of species, and which in truth are simply due to inheritance; for an ancient progenitor may have acquired through natural selection some one modification in structure, and, after thousands of generations, some other and independent modification; and these two modifications, having been transmitted to a whole group of descendants with diverse habits, would naturally be thought to be correlated in some necessary manner. So, again, I do not doubt that some apparent correlations, occurring throughout whole orders, are
apparently
entirely
due to the manner alone in which natural selection can act. For instance, Alph.
de
De
Candolle has remarked that winged seeds are never found in fruits which do not
open;
open:
I should explain
this
the
rule by the fact that seeds could not gradually become winged through natural selection, except in fruits which opened; so that the individual plants producing