The Origin of Floral Structures Through Insect and Other AgenciesKegan Paul, Trench, Trübner & Company, Limited, 1888 - 349 pagini |
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Pagina 50
... Müller ) . implies a greater degree of specializa- tion than when the parts of the whorls are free . Thus in Thalamiflora , of such an order as Ranunculaceae with regular flowers and with all the parts of the perianth whorls free , the ...
... Müller ) . implies a greater degree of specializa- tion than when the parts of the whorls are free . Thus in Thalamiflora , of such an order as Ranunculaceae with regular flowers and with all the parts of the perianth whorls free , the ...
Pagina 52
... , which only hovers in front of the orifice , but throws no weight upon the corolla . * See Müller's figures , Fertilisation , etc. , pp . 296 , 303 . We may see , as it were , Nature's first 52 THE STRUCTURE OF FLOWERS .
... , which only hovers in front of the orifice , but throws no weight upon the corolla . * See Müller's figures , Fertilisation , etc. , pp . 296 , 303 . We may see , as it were , Nature's first 52 THE STRUCTURE OF FLOWERS .
Pagina 58
... Müller . + A curious additional protection occurs in Hippocrepis comosa , in that the claw of the vexillum , which is elevated in a remarkable manner , by such as have proboscides of sufficient length to reach 58 THE STRUCTURE OF FLOWERS .
... Müller . + A curious additional protection occurs in Hippocrepis comosa , in that the claw of the vexillum , which is elevated in a remarkable manner , by such as have proboscides of sufficient length to reach 58 THE STRUCTURE OF FLOWERS .
Pagina 102
... Müller , by more than sixty different species of insects ; whereas species of Aconitum and Delphinium , the two most highly differentiated and the only genera with irregular flowers of the same 102 THE STRUCTURE OF FLOWERS .
... Müller , by more than sixty different species of insects ; whereas species of Aconitum and Delphinium , the two most highly differentiated and the only genera with irregular flowers of the same 102 THE STRUCTURE OF FLOWERS .
Pagina 111
... Müller ) . pair of petals , not sharing in the support of the insect , are not enlarged at all . In Circea and Veronica Chamædrys ( Fig . 35 ) , the insect clings to the two stamens and style ; and the anterior petals are not enlarged ...
... Müller ) . pair of petals , not sharing in the support of the insect , are not enlarged at all . In Circea and Veronica Chamædrys ( Fig . 35 ) , the insect clings to the two stamens and style ; and the anterior petals are not enlarged ...
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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