Flowers, Fruits and LeavesMacmillan, 1886 - 147 páginas |
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Página 20
... developed , but which , having become useless , have almost disappeared . In the Deadnettle , it would appear that the pistil matures as early as the stamens , and that cross - fertili- sation is attained by the relative position of the ...
... developed , but which , having become useless , have almost disappeared . In the Deadnettle , it would appear that the pistil matures as early as the stamens , and that cross - fertili- sation is attained by the relative position of the ...
Página 35
... instance , of aphis and coccus— have turned the tables on the plants , and converted ants from enemies into friends , by themselves develop- ing nectaries , and secreting honey , which the ants 36 PROTECTION OF PLANTS . [ CHAP . love . D 2.
... instance , of aphis and coccus— have turned the tables on the plants , and converted ants from enemies into friends , by themselves develop- ing nectaries , and secreting honey , which the ants 36 PROTECTION OF PLANTS . [ CHAP . love . D 2.
Página 46
... developed into coloured leaves like those of the corolla , and monstrous flowers are not unfrequently met with , in which the stamens are green leaves , more or less resembling the ordinary leaves of the plant . Lastly , in the centre ...
... developed into coloured leaves like those of the corolla , and monstrous flowers are not unfrequently met with , in which the stamens are green leaves , more or less resembling the ordinary leaves of the plant . Lastly , in the centre ...
Página 48
... developed in many Proteaceæ , the Brazil - nut , the so- called Monkey - pot , the Cocoa - nut , and other palms . In other cases the envelopes protect the seeds , not only by their thickness and toughness , but also by their bitter ...
... developed in many Proteaceæ , the Brazil - nut , the so- called Monkey - pot , the Cocoa - nut , and other palms . In other cases the envelopes protect the seeds , not only by their thickness and toughness , but also by their bitter ...
Página 53
... developed . The stamens also are small , but contain pollen , though less than in the coloured flowers . In the autumn large numbers of these curious flowers are produced . When very young they look like an ordinary flower - bud ( Figs ...
... developed . The stamens also are small , but contain pollen , though less than in the coloured flowers . In the autumn large numbers of these curious flowers are produced . When very young they look like an ordinary flower - bud ( Figs ...
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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,...