The Origin of Floral Structures Through Insect and Other AgenciesKegan Paul, Trench, Trübner & Company, Limited, 1888 - 349 pagini |
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Pagina v
... appears to be reviving . To illustrate the progress of this belief , I will give a few cases . In 1795 , Geoffroy Saint Hilaire " seems to have relied chiefly on the conditions of life , or the ' monde ambiant , ' as the cause of change ...
... appears to be reviving . To illustrate the progress of this belief , I will give a few cases . In 1795 , Geoffroy Saint Hilaire " seems to have relied chiefly on the conditions of life , or the ' monde ambiant , ' as the cause of change ...
Pagina 14
... appear from certain numerical proportions ; and , in the next chapter , to significant facts observable in the symmetry of particular plants . Commencing with genera possessing alternate leaves and a quinary floral type , the prominent ...
... appear from certain numerical proportions ; and , in the next chapter , to significant facts observable in the symmetry of particular plants . Commencing with genera possessing alternate leaves and a quinary floral type , the prominent ...
Pagina 16
... appears at first sight to negative the theory ; but , as mentioned above , these and other irregularities have been brought about by subsequent differentiations in the foliage or flowers . On the other hand , opposite leaves with ...
... appears at first sight to negative the theory ; but , as mentioned above , these and other irregularities have been brought about by subsequent differentiations in the foliage or flowers . On the other hand , opposite leaves with ...
Pagina 17
... appear together , subsequently the two lateral arise simultaneously . In Deutzia , however , the two anterior sepals correspond to Nos . 1 and 3 ; two sepals are lateral , viz . , Nos . 4 and 5 ; and the posterior sepal is No. 2. Thus ...
... appear together , subsequently the two lateral arise simultaneously . In Deutzia , however , the two anterior sepals correspond to Nos . 1 and 3 ; two sepals are lateral , viz . , Nos . 4 and 5 ; and the posterior sepal is No. 2. Thus ...
Pagina 19
... appear to have become so , as in the terminal flowers of Adoxa and Monotropa . On the other hand , the constant occurrence and , therefore , specific character of 4 - merous flowers in Potentilla Tormentilla , and 3 - merous in Tillaa ...
... appear to have become so , as in the terminal flowers of Adoxa and Monotropa . On the other hand , the constant occurrence and , therefore , specific character of 4 - merous flowers in Potentilla Tormentilla , and 3 - merous in Tillaa ...
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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Pagina 7 - COX, Rev. Sir GW, MA, Bart., and JONES, Eustace Hinton.— Popular Romances of the Middle Ages. Third Edition, in I vol. Crown Svo, 6s.
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