Origin of Species Variorum

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

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

→ corolla of 1859 1860 1861 1866

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

→ that the inner and outer flowers 1859 1860 1861 1866

which 1869 1872

→ differ. 1859 1860 1861 1866

differ in their inner and outer flowers. 1869 1872

→ certain other parts of the flower had 1859 1860 1861 1866

the reproductive organs had 1869

the reproductive organs 1872

→ in 1859 1860 1861 1866

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

→ there is a difference in 1859 1860 1861 1866

OMIT 1869 1872

→ said to be oftenest 1861 1866

oftenest 1859 1860

most 1869 1872

→ and become regular. 1859 1860 1861 1866

that is they become symmetrical. 1869

that is to become abnormally symmetrical. 1872

→ and of 1859 1860 1861 1866 1869

fact, and as 1872

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

I have recently observed in many pelargoniums, that 1869

in many pelargoniums, the two upper petals in 1872

→ 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

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

often lose their patches of darker colour; and 1872

→ when the 1859 1860 1861 1866

When the 1869

the central flower thus becoming peloric or regular. When the 1872

→ only 1859 1860 1861 1866

not quite aborted but is 1869 1872

→ of the central and exterior flowers of a head or umbel, I do not feel at all sure that C. c. 1859 1860 1861

of the central and exterior flowers of a head or umbel, I do not feel at all sure that c. c. 1866

in the central and exterior flowers, 1869

OMIT 1872

→ in 1859 1860 1861 1866

or necessary for 1869 1872

→ plants of these two orders, is so far-fetched, as it may at first appear: 1859 1860 1861

plants of these two orders, is so far-fetched as it may at first appear: 1866

these plants, is highly probable; 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

of the →seeds in the ray-florets in some Compositæ countenances this idea; but, in the case of the →corolla of the Umbelliferæ, it is by no means, as Dr. Hooker informs me,

the

species with the densest heads →that the inner and outer flowers most frequently →differ. It might have been thought that the development of the ray-petals by drawing nourishment from →certain other parts of the flower had

causes

caused

their abortion; but →in some Compositæ →there is a difference in the seeds of the outer and inner florets

differ without

differ, without

without

any difference in the corolla.

Possibly,

Possibly

these several

differ- ences

differences

may be connected with

the

some

different

difference

~~in the~~

in the

flow of nutriment towards the central and external flowers: we know, at least, that

with normally

with

irregular flowers, those nearest to the axis are →said to be oftenest subject to peloria, →and become regular. I may add, as an instance of

this

this,

→and of a striking case of correlation, that →I have recently observed in some garden pelargoniums, that

in the

the

central flower of the

truss,

truss

→often loses the patches of darker colour in the two upper petals; and that when this occurs, the adherent nectary is quite

aborted.

aborted;

→when the colour is absent from only one of the two upper petals, the nectary is →only much shortened.

With respect to the

development of

difference in

the

corolla,

corolla

→of the central and exterior flowers of a head or umbel, I do not feel at all sure that C. c.

Sprengels

Sprengel's

idea that the ray-florets serve to attract insects, whose agency is highly advantageous →in the fertilisation of →plants of these two orders, is so far-fetched, as it may at first appear: 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