The Origin of Floral Structures Through Insect and Other AgenciesKegan Paul, Trench, Trübner & Company, Limited, 1888 - 349 pagini |
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Pagina 10
... growing stems , such as of the Jerusalem Artichoke . Whenever this plant bears opposite leaves below , and alternate leaves above , it will be found that the arrangement of the latter is almost invariably 10 THE STRUCTURE OF FLOWERS .
... growing stems , such as of the Jerusalem Artichoke . Whenever this plant bears opposite leaves below , and alternate leaves above , it will be found that the arrangement of the latter is almost invariably 10 THE STRUCTURE OF FLOWERS .
Pagina 42
... growing erect shoots - as , for example , the common Laurel - have their leaf - arrangements represented by the fractions or , but when extending horizontally , as in the usual con- dition , they are distichous . Similar features are ...
... growing erect shoots - as , for example , the common Laurel - have their leaf - arrangements represented by the fractions or , but when extending horizontally , as in the usual con- dition , they are distichous . Similar features are ...
Pagina 49
... grown there may be no trace of the line of cohesion . Fibro - vascular cords , indeed , often occur in the very position of it , not unfrequently branching off in various ways , as , e.g. , at the fork to nourish the adjacent free ...
... grown there may be no trace of the line of cohesion . Fibro - vascular cords , indeed , often occur in the very position of it , not unfrequently branching off in various ways , as , e.g. , at the fork to nourish the adjacent free ...
Pagina 50
... grow , and so sweeps out the pollen beyond the extremity of the tube , just as it does from the syngenesious anthers of the Com- posite and Lobelia . The five portions of the corolla thus cohering by con- tact subsequently become more ...
... grow , and so sweeps out the pollen beyond the extremity of the tube , just as it does from the syngenesious anthers of the Com- posite and Lobelia . The five portions of the corolla thus cohering by con- tact subsequently become more ...
Pagina 59
... grow to a somewhat considerable stage of development as incipient anthers before coming into contact . They then coalesce , apparently by a slight solution of the surface of the cellular carries a triangular flap , which exactly covers ...
... grow to a somewhat considerable stage of development as incipient anthers before coming into contact . They then coalesce , apparently by a slight solution of the surface of the cellular carries a triangular flap , which exactly covers ...
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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