The Origin of Floral Structures Through Insect and Other AgenciesKegan Paul, Trench, Trübner & Company, Limited, 1888 - 349 pagini |
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Pagina xvii
... cells of roots of Orchids 43. Stipules of Impatiens , showing nectariferous tissue 44. Petals passing into nectariferous stamens of Atragene 45. Cells of hair of Tradescantia , showing the state of protoplasm before and after excitation ...
... cells of roots of Orchids 43. Stipules of Impatiens , showing nectariferous tissue 44. Petals passing into nectariferous stamens of Atragene 45. Cells of hair of Tradescantia , showing the state of protoplasm before and after excitation ...
Pagina xix
... cells ... ... ... 85. Metamorphosed and foliaceous ovules of Mignonette ... PAGE 302 305 86. Metamorphosed and foliaceous ovules of Sisymbrium Alliaria 306 87. Tubular excrescence on the labellum of Cattleya , homologous with an ovule ...
... cells ... ... ... 85. Metamorphosed and foliaceous ovules of Mignonette ... PAGE 302 305 86. Metamorphosed and foliaceous ovules of Sisymbrium Alliaria 306 87. Tubular excrescence on the labellum of Cattleya , homologous with an ovule ...
Pagina 60
... cells . Anthers , when thus closely approximate without actual cohesion , are usually called " connivent , " as in Ericaceae , and the word is perhaps appropriate to those of Solanum Dulcamara ; but in this plant the union is very close ...
... cells . Anthers , when thus closely approximate without actual cohesion , are usually called " connivent , " as in Ericaceae , and the word is perhaps appropriate to those of Solanum Dulcamara ; but in this plant the union is very close ...
Pagina 64
... cell , and if transverse sections exhibit intermediate positions , in which they are central or scattered irregularly within the phloëm , they are then marginal and placentary . They may change their position from one side to the other ...
... cell , and if transverse sections exhibit intermediate positions , in which they are central or scattered irregularly within the phloëm , they are then marginal and placentary . They may change their position from one side to the other ...
Pagina 65
... cells , having rotated through 90 ° in all . The object of this rotation is to enable them to send off cords to the ovules . The second method is well seen in Geranium , Pelargonium zonale , and Impatiens . A section of the receptacle ...
... cells , having rotated through 90 ° in all . The object of this rotation is to enable them to send off cords to the ovules . The second method is well seen in Geranium , Pelargonium zonale , and Impatiens . A section of the receptacle ...
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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