Origin of Species Variorum

→ 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

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.

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