The Origin of Floral Structures Through Insect and Other AgenciesKegan Paul, Trench, Trübner & Company, Limited, 1888 - 349 pagini |
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Pagina v
... cause of change . ' " ' * In 1801 , Lamarck " attributed something to the direct action of the physical conditions of life " as the means of modification , " something to the crossing of already existing forms , and much to use and ...
... cause of change . ' " ' * In 1801 , Lamarck " attributed something to the direct action of the physical conditions of life " as the means of modification , " something to the crossing of already existing forms , and much to use and ...
Pagina vi
... cause , for he says : " It is curious how largely my grandfather , Dr. Erasmus Darwin , anticipated the views and ... causes of which we are quite ignorant . " He had , however , previously said , “ Changed conditions of life are of the ...
... cause , for he says : " It is curious how largely my grandfather , Dr. Erasmus Darwin , anticipated the views and ... causes of which we are quite ignorant . " He had , however , previously said , “ Changed conditions of life are of the ...
Pagina vii
... cause of many peculiarities in the structure of flowers . The thought passed through my mind that the way the stamens hung down might perhaps have become an hereditary effect from the repeatedly applied weight of the bees . In 1877 , I ...
... cause of many peculiarities in the structure of flowers . The thought passed through my mind that the way the stamens hung down might perhaps have become an hereditary effect from the repeatedly applied weight of the bees . In 1877 , I ...
Pagina viii
... Causes , " I took occasion to remark that " I regarded the environment as by far the most important " cause " of variations , in that it influences the organ- ism , which , by its inherent but latent power to vary , responds to the ...
... Causes , " I took occasion to remark that " I regarded the environment as by far the most important " cause " of variations , in that it influences the organ- ism , which , by its inherent but latent power to vary , responds to the ...
Pagina ix
... 749 . " Use " and " disuse " in animals corresponds to what I have called " hypertrophy " and " atrophy " in plants , in this work . emphasis are just those which Mr. Darwin himself latterly , PREFACE . ix THE CAUSE OF UNIONS.
... 749 . " Use " and " disuse " in animals corresponds to what I have called " hypertrophy " and " atrophy " in plants , in this work . emphasis are just those which Mr. Darwin himself latterly , PREFACE . ix THE CAUSE OF UNIONS.
Alte ediții - Afișează-le pe toate
The Origin of Floral Structures Through Insect and Other Agencies George Henslow Vizualizare completă - 1893 |
The Origin of Floral Structures Through Insect and Other Agencies George Henslow Vizualizare completă - 1888 |
Termeni și expresii frecvente
adaptation to insect androecium anemophilous anthers appear arrested atrophy autogamy axial axis bear become bracts calyx capsules carpellary carpels cause cells character chorisis cleistogamous cleistogamous flowers colour condition corolla crossed Darwin degeneracy degradation Demy 8vo diclinism differentiated fact female flowers fertile fertilisation fibro-vascular cords filaments floral whorls florets foliaceous Forms of Flowers Fourth Edition genera genus grains hermaphrodite heterostyled hypertrophy Illustrations insect agency insects intercrossing irregular irritation Journ Labiata latter leaf leaves less long-styled form male flowers marginal mature Müller nature normally observed occur Orchids origin ovary ovules ovuliferous pedicel perianth petaline petals petioles phyllotaxis pistil placentas pollen pollen-tubes Primula produced protandrous protogynous Ranunculus receptacular tube regard remarkable result seedlings seeds seen self-fertilisation self-fertilised plants sepaline sepals short-styled form Small crown 8vo species spiral stamens stigmas structure style superposed temperature Teratology Third Edition tion tissue usually visited weight whorls
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Pagina 30 - II. Physics and Politics ; or, Thoughts on the Application of the Principles of "Natural Selection " and " Inheritance
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