Flowers, Fruits and LeavesMacmillan, 1886 - 147 páginas |
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Página 20
... touch the pistil and transfer to it some of the pollen , before coming in contact with the stamens . In other species belonging to the same great group ( Labiata ) as La- mium , the same object is secured by the fact that the stamens ...
... touch the pistil and transfer to it some of the pollen , before coming in contact with the stamens . In other species belonging to the same great group ( Labiata ) as La- mium , the same object is secured by the fact that the stamens ...
Página 24
... touch one another , the pollen cannot drop out . Each also sends out a long process , so that the ring of anthers is surrounded by a row of spokes . Now when a bee comes to suck the honey , it first touches the end of the pistil , on ...
... touch one another , the pollen cannot drop out . Each also sends out a long process , so that the ring of anthers is surrounded by a row of spokes . Now when a bee comes to suck the honey , it first touches the end of the pistil , on ...
Página 36
... , not only would these deprive the flowers of their honey , without ful- filling any useful function in return , but they would probably prevent the really useful visits of bees . If 11. ] CHEVAUX DE FRISE . 37 you touch an.
... , not only would these deprive the flowers of their honey , without ful- filling any useful function in return , but they would probably prevent the really useful visits of bees . If 11. ] CHEVAUX DE FRISE . 37 you touch an.
Página 37
Sir John Lubbock. 11. ] CHEVAUX DE FRISE . 37 you touch an ant with a needle or a bristle , she is almost sure to seize it in her jaws ; and if bces , when visiting any particular species , were liable to have the delicate tip of their ...
Sir John Lubbock. 11. ] CHEVAUX DE FRISE . 37 you touch an ant with a needle or a bristle , she is almost sure to seize it in her jaws ; and if bces , when visiting any particular species , were liable to have the delicate tip of their ...
Página 38
... obtain access , they would steal the honey without fertilising the flower ; a flying insect , on the contrary , alighting on the flower , could scarcely fail to touch the stigma . 11. ] GLANDULAR HAIRS . 39 The beautiful rosy flowers.
... obtain access , they would steal the honey without fertilising the flower ; a flying insect , on the contrary , alighting on the flower , could scarcely fail to touch the stigma . 11. ] GLANDULAR HAIRS . 39 The beautiful rosy flowers.
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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,...