Origin of Species Variorum

→ the 1859 1860 1861 1866 1869

on the whole the 1872

→ teeth. 1859 1860 1861 1866 1869

teeth; but there are so many exceptions to this rule, as Mr. Mivart has remarked, that it has little value. 1872

→ variation and correlation, 1869

correlation in modifying important structures, 1859 1860 1861

correlation in leading to modifications of important structures, 1866

correlation and variation, 1872

→ before referred to, of 1869

of 1859 1860 1861 1866 1872

→ knows 1859 1860 1861 1866 1869

is familiar with 1872

→ partial or complete abortion 1869 1872

abortion of parts 1859 1860 1861 1866

→ been attributed by some authors to the pressure 1869

been attributed by some authors to pressure, and the shape 1859 1860 1861 1866

sometimes been attributed to the pressure 1872

→ involucra on the florets, or to their mutual pressure, and the shape 1869 1872

seeds in the ray-florets in some Compositæ countenances this idea; but, in the case 1859 1860 1861 1866

→ seeds in the ray-florets of some Compositæ countenances this idea; but with 1869 1872

corolla of 1859 1860 1861 1866

→ which 1869 1872

that the inner and outer flowers 1859 1860 1861 1866

→ differ in their inner and outer flowers. 1869 1872

differ. 1859 1860 1861 1866

→ the reproductive organs had 1869

certain other parts of the flower had 1859 1860 1861 1866

the reproductive organs 1872

→ this can hardly be the sole cause, for in 1869 1872

in 1859 1860 1861 1866

→ OMIT 1869 1872

there is a difference in 1859 1860 1861 1866

→ most 1869 1872

oftenest 1859 1860

said to be oftenest 1861 1866

→ that is they become symmetrical. 1869

and become regular. 1859 1860 1861 1866

that is to become abnormally symmetrical. 1872

→ and of 1859 1860 1861 1866 1869

fact, and as 1872

→ I have recently observed in many pelargoniums, that 1869

I have recently observed in some garden pelargoniums, that 1859 1860 1861 1866

in many pelargoniums, the two upper petals in 1872

→ the two upper petals often lose their patches of darker colour; and 1869

often loses the patches of darker colour in the two upper petals; and that 1859 1860 1861

often loses the patches of darker colour in the two upper petals; and that, 1866

often lose their patches of darker colour; and 1872

&c.),

that these

~~these~~

these

are likewise →the most abnormal in their →teeth.

I know of no case better adapted to show the importance of the laws of →variation and correlation, independently of utility

and,

and

therefore,

therefore

of natural selection, than that →before referred to, of the difference between the outer and inner flowers in some Compositous and Umbelliferous plants. Every one →knows the difference

between

the ray and central florets of, for instance, the daisy, and this difference is often accompanied with the →partial or complete abortion of the

flower.

reproductive organs.

But,

But

in some

Compositous

of these

plants, the seeds also differ in shape and

sculpture;

and

even

the

ovary

itself,

with

its

accessory

parts,

differs,

has

been

described

Cassini.

These differences have →been attributed by some authors to the pressure of the →involucra on the florets, or to their mutual pressure, and the shape of the →seeds in the ray-florets of some Compositæ countenances this idea; but with the Umbelliferæ, it is by no means, as Dr. Hooker informs me,

the

species with the densest heads →which most frequently →differ in their inner and outer flowers. It might have been thought that the development of the ray-petals by drawing nourishment from →the reproductive organs had

causes

caused

their abortion; but →this can hardly be the sole cause, for in some Compositæ →OMIT the seeds of the outer and inner florets

without

differ, without

differ without

any difference in the corolla.

Possibly,

Possibly

these several

differ- ences

differences