The Origin of Floral Structures Through Insect and Other AgenciesKegan Paul, Trench, Trübner & Company, Limited, 1888 - 349 pagini |
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Pagina 51
... adapted to long tubular flowers like the Honeysuckle . Fig . 10. - Mimulus undergoing " Dialysis " ( after Baillon ) . An analogous process of congenital cohesion is well seen in the fasciation of stems which occurs particularly often ...
... adapted to long tubular flowers like the Honeysuckle . Fig . 10. - Mimulus undergoing " Dialysis " ( after Baillon ) . An analogous process of congenital cohesion is well seen in the fasciation of stems which occurs particularly often ...
Pagina 52
... adapted to insects which alight upon the corolla limb ; while for Lepidoptera the tube is more elongated , and , as no weight is thrown on the anterior petals , no extra support is required . That this is the true interpretation of the ...
... adapted to insects which alight upon the corolla limb ; while for Lepidoptera the tube is more elongated , and , as no weight is thrown on the anterior petals , no extra support is required . That this is the true interpretation of the ...
Pagina 101
... adapted to insects , according as the honey is easily accessible or not . Regular flowers when borne singly are almost always terminal ; † and when they are arranged in racemes , etc. , they either stand out erect at the ends of their ...
... adapted to insects , according as the honey is easily accessible or not . Regular flowers when borne singly are almost always terminal ; † and when they are arranged in racemes , etc. , they either stand out erect at the ends of their ...
Pagina 102
... adapted , and consequently restricted to particular visitors . It must not be forgotten , however , that regular flowers , if the tube leading to the honey be very contracted and more or less elongated , may become almost as much ...
... adapted , and consequently restricted to particular visitors . It must not be forgotten , however , that regular flowers , if the tube leading to the honey be very contracted and more or less elongated , may become almost as much ...
Pagina 103
... adapted to , and mainly visited by the larger species of bees . Similarly of conspicuous and regular flowers of Rosacea , Prunus communis has twenty - seven visitors ; Spiraa Ulmaria , twenty - two ; Rubus fruticosus , sixty - seven ...
... adapted to , and mainly visited by the larger species of bees . Similarly of conspicuous and regular flowers of Rosacea , Prunus communis has twenty - seven visitors ; Spiraa Ulmaria , twenty - two ; Rubus fruticosus , sixty - seven ...
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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