The Origin of Floral Structures Through Insect and Other AgenciesKegan Paul, Trench, Trübner & Company, Limited, 1888 - 349 pagini |
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Pagina 2
... characters was felt , developmental history began to be studied ; a method strongly insisted upon by Schleiden , for example ; and the most elaborate result of this method of investigation is undoubtedly Payer's Traité d'Organogénie Com ...
... characters was felt , developmental history began to be studied ; a method strongly insisted upon by Schleiden , for example ; and the most elaborate result of this method of investigation is undoubtedly Payer's Traité d'Organogénie Com ...
Pagina 5
... characters are so often founded , the length of the filaments , and other peculiarities . If all the parts of any whorl be exactly alike , it is said to be " regular ; " if not , the whorl will be " irregular . " The above five ...
... characters are so often founded , the length of the filaments , and other peculiarities . If all the parts of any whorl be exactly alike , it is said to be " regular ; " if not , the whorl will be " irregular . " The above five ...
Pagina 17
... character of the flowers has arisen by a sudden change ( possibly due to the stimulus of insect agency ) from opposition in the leaves or bracts to an alternate arrangement in the parts of the flower . As an illustration of this latter ...
... character of the flowers has arisen by a sudden change ( possibly due to the stimulus of insect agency ) from opposition in the leaves or bracts to an alternate arrangement in the parts of the flower . As an illustration of this latter ...
Pagina 19
... character of 4 - merous flowers in Potentilla Tormentilla , and 3 - merous in Tillaa muscosa , should be inclined to attribute to the fixation of a symme- trical reduction which has taken place from the permanent 5 - merous type so ...
... character of 4 - merous flowers in Potentilla Tormentilla , and 3 - merous in Tillaa muscosa , should be inclined to attribute to the fixation of a symme- trical reduction which has taken place from the permanent 5 - merous type so ...
Pagina 23
... character of alternation in the whorls . But it may be noticed that while the corolla alternates with the calyx , each of these outer whorls gives rise to a radial series of stamens . From the preceding illustrations , it will now be ...
... character of alternation in the whorls . But it may be noticed that while the corolla alternates with the calyx , each of these outer whorls gives rise to a radial series of stamens . From the preceding illustrations , it will now be ...
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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