On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 1
... covered in many cases by furry hairs , and often still further protected from insects and browsing quadrupeds by gummy or resinous secretions . The bud is a short shoot bearing a number of young leaves closely packed together . There is ...
... covered in many cases by furry hairs , and often still further protected from insects and browsing quadrupeds by gummy or resinous secretions . The bud is a short shoot bearing a number of young leaves closely packed together . There is ...
Pagina 2
... covering , has been killed by frost , while the suc- ceeding one , which had two wraps , has escaped . It is remarkable that some even in certain cases species of the same genus , often differ in the method of the protection of the bud ...
... covering , has been killed by frost , while the suc- ceeding one , which had two wraps , has escaped . It is remarkable that some even in certain cases species of the same genus , often differ in the method of the protection of the bud ...
Pagina 17
... covered over by the bark . Such buds are known as ' dormant . ' They may remain in the same state for years , but if the growing shoots are injured in the struggle for existence these reserves are called into the field . Their presence ...
... covered over by the bark . Such buds are known as ' dormant . ' They may remain in the same state for years , but if the growing shoots are injured in the struggle for existence these reserves are called into the field . Their presence ...
Pagina 18
... covered with a thick growth of young shoots , springing up rapidly , at the expense of the nourish- ment stored up in the roots which remain in the ground . Such shoots are also common in Poplars , Limes , many fruit trees , & c ...
... covered with a thick growth of young shoots , springing up rapidly , at the expense of the nourish- ment stored up in the roots which remain in the ground . Such shoots are also common in Poplars , Limes , many fruit trees , & c ...
Pagina 25
... covering the terminal bud . B. Terminal shoot with lamina of leaves removed , x2 ; st ' , st " , stipules as in A ; b , lateral bud . Stipules are sometimes situated on the leaf - base , sometimes at the foot of the leaf - base ...
... covering the terminal bud . B. Terminal shoot with lamina of leaves removed , x2 ; st ' , st " , stipules as in A ; b , lateral bud . Stipules are sometimes situated on the leaf - base , sometimes at the foot of the leaf - base ...
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Termeni și expresii frecvente
apex axil axillary buds axis base Beech Bentham blade brown Bud Protection bud-scales Candolle completely covered concave conduplicate connate stipules cotyledons developed edges exstipulate fifth folded foliaceous genera genus glabrous glands growing-point growth Guaiacum officinale hairs hairy Helianthemum Hornbeam Horse Chestnut Hypericum calycinum Illustrations inner instance lamina Lantana lateral buds Lathyrus Lathyrus Aphaca Lathyrus Nissolia leaf leaf-base leaf-blade leaf-stalk leaflets length less lobes lower membranous midrib Monocotyledons narrow node ocrea Opulus outer scales ovate pair of leaves pair of stipules pedestal persistent petiole Petteria PLANE Platanus plant Polygonum protect the bud protect the young Robinia scale fig scar sheath showing side slightly sometimes species St FIG st st stalk stem stipular stipules belonging stipules fig stipules St subulate tendrils terminal bud triangular Tulip Tree upper Viburnum Viburnum Lantana Viburnum Opulus Whitebeam winter winter-bud Wych Elm young bud young leaves Young Shoot younger
Pasaje populare
Pagina 191 - The acacia, however, bears hollow thorns, while each leaflet produces honey in a craterformed gland at the base, and a small, sweet, pearshaped body at the tip. In consequence, it is inhabited by myriads of a small ant, which nests in the hollow thorns, and thus finds meat, drink, and lodging all provided for it. These ants are continually roaming over the plant, and constitute a most efficient body-guard, not only driving off the leaf-cutting ants, but, in Belt's opinion, rendering the leaves less...
Pagina 233 - ... the presence, the uses, and the forms of stipules, and the structure of buds in some of our common trees, shrubs, and herbs. If I shall have induced any of my readers to look at them for themselves in the coming spring they will, I am sure, be amply rewarded. They will often be reminded of Tennyson's profound remark about Nature : So careless of the single life, So careful of the type she seems...
Pagina 68 - Plants, p. 286. -purpwrea, which naturally sink at night (the plants growing out of doors), and looked at them early on several successive mornings, after they had assumed their diurnal positions. The difference in the amount of dew on the pinned-open leaflets and on those which had gone to sleep was generally conspicuous, the latter being sometimes absolutely dry. whilst the leaflets which had been horizontal were coated with large beads of dew. This shows how much cooler the leaflets fully exposed...