The Origin of Floral Structures Through Insect and Other AgenciesKegan Paul, Trench, Trübner & Company, Limited, 1888 - 349 pagini |
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Pagina 6
... axis of the former , constituting the floral receptacle ; and the question arises , how has this arrest been brought about ? Like all other peculiarities of structure to be described , I would attribute the arrest primarily to the ...
... axis of the former , constituting the floral receptacle ; and the question arises , how has this arrest been brought about ? Like all other peculiarities of structure to be described , I would attribute the arrest primarily to the ...
Pagina 26
... not par- ticularly common , though a quaternary calyx is dimerous in its development , as the sepals emerge from the axis in suc- cessive pairs . The following may be taken as illustrative 26 THE STRUCTURE OF FLOWERS .
... not par- ticularly common , though a quaternary calyx is dimerous in its development , as the sepals emerge from the axis in suc- cessive pairs . The following may be taken as illustrative 26 THE STRUCTURE OF FLOWERS .
Pagina 27
... axis , and not simultaneously as do the petals ; but as long as no rudi- mentary organs exist , there is nothing to disprove the idea that in these genera the number of stamens may not be due to degradation . Indeed , all analogy would ...
... axis , and not simultaneously as do the petals ; but as long as no rudi- mentary organs exist , there is nothing to disprove the idea that in these genera the number of stamens may not be due to degradation . Indeed , all analogy would ...
Pagina 31
... an oval just below the flower . Two * See my paper On the Structure of a Cruciferous Flower , Trans . Lin . Soc . , 2nd series , BOTANY , vol . i . p . 191 . cords , one at each end of the long axis THE PRINCIPLE OF NUMBER . 31.
... an oval just below the flower . Two * See my paper On the Structure of a Cruciferous Flower , Trans . Lin . Soc . , 2nd series , BOTANY , vol . i . p . 191 . cords , one at each end of the long axis THE PRINCIPLE OF NUMBER . 31.
Pagina 32
George Henslow. cords , one at each end of the long axis , now part company from the rest , and enter the lateral sepals ( Fig . 6 ( a ) l.s. ) , the antero - posterior sepals next receiving their cords ( a.s. and p.s. ) . The cylinder ...
George Henslow. cords , one at each end of the long axis , now part company from the rest , and enter the lateral sepals ( Fig . 6 ( a ) l.s. ) , the antero - posterior sepals next receiving their cords ( a.s. and p.s. ) . The cylinder ...
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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