Flowers, Fruits and LeavesMacmillan, 1886 - 147 páginas |
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Página 5
... object be placed on the leaf , these glandular hairs slowly fold over it , though if it be inor- ganic they soon unfold again . On the other hand , if any small insect alights on the leaf it becomes en- tangled in the glutinous ...
... object be placed on the leaf , these glandular hairs slowly fold over it , though if it be inor- ganic they soon unfold again . On the other hand , if any small insect alights on the leaf it becomes en- tangled in the glutinous ...
Página 19
... object in visiting the flower . The bright colour is useful in rendering the flower conspicuous . The platform serves as an alighting stage for bees . The length of the tube has reference to that of their proboscis , and prevents the ...
... object in visiting the flower . The bright colour is useful in rendering the flower conspicuous . The platform serves as an alighting stage for bees . The length of the tube has reference to that of their proboscis , and prevents the ...
Página 20
... object is secured by the fact that the stamens come to maturity before the pistil ; they shed their pollen , and shrivel up before the stigma is mature . Fig . 14 represents a young flower of Salvia officinalis in which the stamens ...
... object is secured by the fact that the stamens come to maturity before the pistil ; they shed their pollen , and shrivel up before the stigma is mature . Fig . 14 represents a young flower of Salvia officinalis in which the stamens ...
Página 23
... object . It is therefore an advantage that they should be ex- cluded , and in fact they are not strong enough to move the spring . The Antirrhinum is , so to say , a closed box , of which the humble bees alone possess the key . The ...
... object . It is therefore an advantage that they should be ex- cluded , and in fact they are not strong enough to move the spring . The Antirrhinum is , so to say , a closed box , of which the humble bees alone possess the key . The ...
Página 30
... object probably is to secure , with as little ex- penditure as possible , the continuance of the species in cases when , from unfavourable weather or other causes , insects are absent ; and under such circum- stances , as scent , honey ...
... object probably is to secure , with as little ex- penditure as possible , the continuance of the species in cases when , from unfavourable weather or other causes , insects are absent ; and under such circum- stances , as scent , honey ...
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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,...