The Effects of Cross And Self Fertilisation in the Vegetable Kingdom
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38 IL 42 64 Total in inche*.
98 102 The mean of the two crossed is 49 inches, and that of the two aolf-fertilised 51 inches ; or as 100 to 104.
* Variation of Animals and chap. Xvii. 2nd edit. Vol. Ii. P. Plants under Domestication ' 118.
172 SCABIOSA ATKO-PURPUREA.
CHA. P. V XVIII. UMBELLIFEE^. APIUM PETROSELINUM. The Umbelliferse are proterandrous, and can hardly fail to lie cross-fertilised by the many flies and small Hymenoptera which visit the flowers. * A plant of the common parsley was c...overed by a net, and it apparently produced as many and as fine spontaneously self-fertilised fruits or seeds as the adjoining uncovered plants. The flowers on the latter were visited by so many insects that they must have received pollen from one another. Some of these two lots of seeds were left on sand, but nearly all the self-fertilised seeds germinated before the others, so that I was forced to throw all away. The remaining seeds were then sown on the opposite sides of four pots. At first the self-fertilised seedlings were a little taller in most of the pots than the naturally crossed seedlings, and this no doubt was due to the self-fertilised seeds having germinated first.
What to read after The Effects of Cross And Self Fertilisation in the Vegetable Kingdom?
You can find similar books in the "Read Also" column, or choose other free books by Darwin, Charles, 1809-1882 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
38 IL 42 64 Total in inche*.
98 102 The mean of the two crossed is 49 inches, and that of the two aolf-fertilised 51 inches ; or as 100 to 104.
* Variation of Animals and chap. Xvii. 2nd edit. Vol. Ii. P. Plants under Domestication ' 118.
172 SCABIOSA ATKO-PURPUREA.
CHA. P. V XVIII. UMBELLIFEE^. APIUM PETROSELINUM. The Umbelliferse are proterandrous, and can hardly fail to lie cross-fertilised by the many flies and small Hymenoptera which visit the flowers. * A plant of the common parsley was c...overed by a net, and it apparently produced as many and as fine spontaneously self-fertilised fruits or seeds as the adjoining uncovered plants. The flowers on the latter were visited by so many insects that they must have received pollen from one another. Some of these two lots of seeds were left on sand, but nearly all the self-fertilised seeds germinated before the others, so that I was forced to throw all away. The remaining seeds were then sown on the opposite sides of four pots. At first the self-fertilised seedlings were a little taller in most of the pots than the naturally crossed seedlings, and this no doubt was due to the self-fertilised seeds having germinated first.
What to read after The Effects of Cross And Self Fertilisation in the Vegetable Kingdom?
You can find similar books in the "Read Also" column, or choose other free books by Darwin, Charles, 1809-1882 to read onlineMoreLess
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