Some of the kinds have their floral organs so arranged as to be capable of self-fertilisation; still, it is always as well to give them some assistance. From Wordnik.com. [Cactus Culture for Amateurs Being Descriptions of the Various Cactuses Grown in This Country, With Full and Practical Instructions for Their Successful Cultivation] Reference
Corydalis, Hildebrand shows falsity of idea of self-fertilisation of. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
I fancy that I see my way with the aid of continued self-fertilisation. From Wordnik.com. [More Letters of Charles Darwin — Volume 1] Reference
A short note describing Cruger's discovery of self-fertilisation in Cattleya. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
There are many plants, however, in which special arrangements exist to secure self-fertilisation. From Wordnik.com. [Darwinism (1889)] Reference
All facts point clearly to eternal self-fertilisation in this species; yet I cannot swallow the bitter pill. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
The doctrine which has been epitomised as "Nature abhors perpetual self-fertilisation," and is generally known as. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
Hummingbirds are more likely to drink from multiple flowers on the same plant, which would lead to a lot of self-fertilisation. From Wordnik.com. [ScienceBlogs Channel : Life Science] Reference
I never saw the very curious flower of Canna; I should say the pollen was deposited where it is to prevent inevitable self-fertilisation. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
In the more simple class self-fertilisation occurs freely, but it is prevented in the more complex flowers by the stamens maturing before the pistil. From Wordnik.com. [Darwinism (1889)] Reference
The Fumariaceae offer a good instance of this, and Treviranus threw this order in my teeth; but in Corydalis Hildebrand shows how utterly false the idea of self-fertilisation is. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
I have never hitherto found the rule to fail that when an author describes the structure of a flower as specially adapted for self-fertilisation, it is really adapted for crossing. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
Cross-fertilisation is much surer by insects than by the wind, and cross-fertilisation is more advantageous than self-fertilisation because it promotes both fertility and plasticity. From Wordnik.com. [The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told] Reference
Any one who saw stamen after stamen bending upwards and shedding pollen over the stigmas of the same flower would declare that the structure was an admirable contrivance for self-fertilisation. From Wordnik.com. [More Letters of Charles Darwin — Volume 1] Reference
Finally he concludes: "It is hardly an exaggeration to say that nature tells us, in the most emphatic manner, that she abhors perpetual self-fertilisation"; and thus was announced a new doctrine in botany. From Wordnik.com. [Life of Charles Darwin] Reference
How strange that the pollen and stigmatic surface of the same flower, though placed so close together, as if for the very purpose of self-fertilisation, should in so many cases be mutually useless to each other!. From Wordnik.com. [On the Origin of Species by Means of Natural Selection or the Preservation of Favoured Races in the Struggle for Life. (2nd edition)] Reference
How strange that the pollen and stigmatic surface of the same flower, though placed so close together, as if for the very purpose of self-fertilisation, should be in so many cases mutually useless to each other!. From Wordnik.com. [IV. Natural Selection; or the Survival of the Fittest. On the Intercrossing of Individuals] Reference
Yet in many of its close allies insect agency is absolutely required; but in one of these, the fly-orchis, comparatively very little seed is produced, and self-fertilisation would therefore be advantageous to it. From Wordnik.com. [Darwinism (1889)] Reference
Even if these take place only at long intervals, I am convinced that the young thus produced will gain so much in vigour and fertility over the offspring from long-continued self-fertilisation, that they will have. From Wordnik.com. [On the origin of species] Reference
And S. Gevaert, on cross and self-fertilisation. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
(590/6. 1871, page 1103.), in which he expresses himself as "agreeably surprised" to find Leschenaultia adapted for self-fertilisation, or at least for self-pollinisation. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
There seem to be mechanisms for cross - and also for self-fertilisation.), the stigmas open out and are pollinated from younger flowers. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
This absolutely prevents self-fertilisation. From Wordnik.com. [Darwinism (1889)] Reference
self-fertilisation. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
self-fertilisation of. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
On self-fertilisation. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
self-fertilisation in. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
self-fertilisation and. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
On self-fertilisation in flowers. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
Fumariaceae, cross - and self-fertilisation. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
Cross-and self-fertilisation, i. 169, 297, ii. From Wordnik.com. [Alfred Russel Wallace Letters and Reminiscences]
R. odorata, experiment on cross-and self-fertilisation. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
Insect and self-fertilisation, alternation of, in flowers, 328. From Wordnik.com. [Darwinism (1889)] Reference
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