Origin of Species Variorum

→ OMIT 1869 1872

of the same species of Verbascum when 1859 1860 1861 1866

→ of the same species. 1869 1872

when fertilised with pollen from their own coloured flowers. 1859 1860 1861

when fertilised with pollen from its own coloured flowers. 1866

→ differ in no respect except in the 1869 1872

of Verbascum present no other difference besides the mere 1859 1860 1861 1866

↑ 1 blocks not present in 1866 1869 1872; present in 1859 1860 1861

From observations which I have made on certain varieties of hollyhock, I am inclined to suspect that they present analogous facts.

→ than the other varieties, when 1869 1872

when 1859 1860 1861 1866

→ glutinosa. 1859 1860 1866 1869 1872

glutinosa. Hence the reproductive system of this one variety must have been in some manner and in some degree modified. 1861

→ it cannot be maintained that varieties when crossed are invariably quite fertile;—from 1869

from 1859 1860 1861 1866

it can no longer be maintained that varieties when crossed are invariably quite fertile. From 1872

→ proved to be infertile 1866 1869 1872

infertile 1859 1860 1861

→ a species;—from man attending only to 1869

species; from man selecting only 1859 1860 1861

a species; from man selecting only 1866

a species;— from man attending only 1872

and white varieties →OMIT

intercrossed

when crossed

produce less

seed,

seed

than

do either

does either

the similarly

coloured

variety

varieties

→of the same species. Moreover, he asserts

that

that,

when yellow and white varieties of one species are crossed with yellow and white varieties of a distinct species, more seed is produced by the crosses between the

same

similarly

coloured flowers, than between those which are differently coloured. Mr.

Scott

Scott,

also

also,

has experimented on the species and varieties of Verbascum; and although unable to confirm

Gärtner's

Gärtners

results on the crossing of the distinct species, he finds that the dissimilarly coloured varieties of the same species yield fewer seeds, in the proportion of 86 to 100, than the similarly coloured varieties. Yet these varieties →differ in no respect except in the colour of

the

their

flower;

flowers;

and one variety can sometimes be raised from the seed of

the

....

other.

another.

↑

Kölreuter, whose accuracy has been confirmed by every subsequent observer, has proved the remarkable fact, that one

variety

particular variety

of the common tobacco

was

fertile,

fertile

→than the other varieties, when crossed with a widely distinct

species,

than

are

the

other

varieties.

experimentised

on five

forms

forms,

which are commonly reputed to be varieties, and which he tested by the severest trial, namely, by reciprocal crosses, and he found their mongrel offspring perfectly fertile. But one of these five varieties, when used either as

father

the father

or mother, and crossed with the Nicotiana glutinosa, always yielded hybrids not so sterile as those which were produced from the four other varieties when crossed with N. →glutinosa. Hence the reproductive system of this one variety must have been in some manner and in some degree modified.

From these

facts;

facts

→it cannot be maintained that varieties when crossed are invariably quite fertile;—from the great difficulty of ascertaining the infertility of varieties in a state of nature, for a supposed

variety

variety,

if →proved to be infertile in any

degree

degree,

would

generally

almost universally

be ranked as →a species;—from man attending only to