Flowers, Fruits and LeavesMacmillan, 1886 - 147 páginas |
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Página ix
... Surfaces - Barriers - Sleep of Plants - Sleep of Leaves- Relation of the Sleep of Flowers to the Habits of Insects- The Scent of Flowers - Bee Flowers and Fly Flowers - The Origin of Flowers . Pages 23-44 · X CONTENTS . CHAPTER III ...
... Surfaces - Barriers - Sleep of Plants - Sleep of Leaves- Relation of the Sleep of Flowers to the Habits of Insects- The Scent of Flowers - Bee Flowers and Fly Flowers - The Origin of Flowers . Pages 23-44 · X CONTENTS . CHAPTER III ...
Página 5
... surfaces are covered with two sets of glandular hairs . In this case the naturally incurved edges curve over still more if a fly or other insect be placed on the leaf . Another case is that of Utricularia , an aquatic species , which ...
... surfaces are covered with two sets of glandular hairs . In this case the naturally incurved edges curve over still more if a fly or other insect be placed on the leaf . Another case is that of Utricularia , an aquatic species , which ...
Página 10
... surface . The male flowers on the contrary are minute and sessile , but when mature they detach themselves from the plant , rise to the surface , and float about freely like little boats among the female flowers . Wind - fertilised ...
... surface . The male flowers on the contrary are minute and sessile , but when mature they detach themselves from the plant , rise to the surface , and float about freely like little boats among the female flowers . Wind - fertilised ...
Página 25
... surface of a more or less flat disc renders it much more accessible than in those cases in which it is situated at the end of a more or less long tube . That of the Deadnettle , for instance , is only accessible to certain humble - bees ...
... surface of a more or less flat disc renders it much more accessible than in those cases in which it is situated at the end of a more or less long tube . That of the Deadnettle , for instance , is only accessible to certain humble - bees ...
Página 26
... surfaces ( Fig . 21 ) , on which an insect , coming from a younger flower , could hardly fail to deposit some pollen . The two stigmas in the ray florets of Parthenium have no brush of hairs ; 11. ] LOTUS . 27 and they would be of.
... surfaces ( Fig . 21 ) , on which an insect , coming from a younger flower , could hardly fail to deposit some pollen . The two stigmas in the ray florets of Parthenium have no brush of hairs ; 11. ] LOTUS . 27 and they would be of.
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Términos y frases comunes
Acacia advantage Agrimony allied animals anthers ants arrangement Beech bees belong branch canina capsule Cardamine carpel CHAP close colour common contrary corolla Crown 8vo curious Darwin Deadnettle dispersion distance Ditto Drosera Drosera rotundifolia edible Epilobium fertilised fertilised by insects flattened fleshy florets flower-head flowers Fritz Müller fruits genera genus Geranium Geranium dissectum Grant Allen ground grow Herb Herb Robert Hibiscus pedunculatus hirta honey hooks Hornbeam Horse Chestnut Illustrations inches insects instance internodes keel Lamium large number Lathyrus leaf-stalk leaflets leaves less light Lime lobed Maple maturity Moreover nearly observed ovary palmate perhaps petals pinnate pistil plants pods pollen Poplar produced protected resemblance ripe ripen scent Seedling seeds Senecio sepals small insects Spanish Chestnut species SQUIRTING CUCUMBER stalk stamens stamens and pistil stem stigma stomata surface Sycamore Thrincia throw trees tube upper Viola canina visited by insects wasp wind wings
Pasajes populares
Página 98 - But the leaves of the herbage at our feet take all kinds of strange shapes, as if to invite us to examine them. Starshaped, heart-shaped, spear-shaped, arrow-shaped, fretted, fringed, cleft, furrowed, serrated, sinuated; in whorls, in tufts, in spires, in wreaths endlessly expressive, deceptive, fantastic, never the same from footstalk to blossom ; they seem perpetually to tempt our watchfulness, and take delight in outstripping our wonder.
Página 117 - Here in the houseless wild, to direct the traveller's journey Over the sea-like, pathless, limitless waste of the desert.
Página 97 - Flowers seem intended for the solace of ordinary humanity : children love them ; quiet, tender, contented ordinary people love them as they grow; luxurious and disorderly people rejoice in them gathered : They are the cottager's treasure ; and in the crowded town, mark, as with a little...
Página 98 - Now. why is this marvellous variety, this inexhaustible treasury of beautiful forms ? Does it result from some innate tendency of each species? Is it intentionally designed to delight the eye of man ? Or has the form and size and texture some reference to the structure and organization, the habits and requirements, of the whole plant...
Página 3 - ... unknown until Mr. Darwin devoted himself to the subject. Our illustrious countryman was the first clearly to perceive that the essential service which insects perform to flowers, consists not only in transferring the pollen from the stamens to the pistil, but in transferring it from the stamens of one flower to the pistil of another. Sprengel had indeed observed in more than one instance that this was the case, but he did not altogether appreciate the importance of the fact. Mr. Darwin, however,...