On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 9
... branch be examined a little later , it will be found to be terminated by a scar , left by the true terminal bud , which has dropped away , so that the one which is apparently terminal is really axil- lary . Fig . 11 represents the end ...
... branch be examined a little later , it will be found to be terminated by a scar , left by the true terminal bud , which has dropped away , so that the one which is apparently terminal is really axil- lary . Fig . 11 represents the end ...
Pagina 94
... branch , and one fork may remain a simple pointed hair , while another develops a gland . The glandular processes are sometimes highly deve- loped ; as , for instance , in the Rose and the Violet , where they are large and oval , one ...
... branch , and one fork may remain a simple pointed hair , while another develops a gland . The glandular processes are sometimes highly deve- loped ; as , for instance , in the Rose and the Violet , where they are large and oval , one ...
Pagina 134
... branch is examined , the scars where the stipules were inserted may be seen , forming rings ( figs . 210 , 211 ) round the base of each annual shoot . The shoot elongates considerably between the leaves , but not between the stipules ...
... branch is examined , the scars where the stipules were inserted may be seen , forming rings ( figs . 210 , 211 ) round the base of each annual shoot . The shoot elongates considerably between the leaves , but not between the stipules ...
Pagina 139
... branches on the expansion of the primary bud , but remain small . Accidents to the primary bud , however , would , of course , cause them to develop . The following is the composition of a flower - bud- that is , one containing catkins ...
... branches on the expansion of the primary bud , but remain small . Accidents to the primary bud , however , would , of course , cause them to develop . The following is the composition of a flower - bud- that is , one containing catkins ...
Pagina 147
... branches or shoots bearing them . The leaves are all conduplicate in bud , acuminate , and penninerved , with closely approximate nerves . The two parts of the leaf are unequal , but this is scarcely discernible in the bud . The broader ...
... branches or shoots bearing them . The leaves are all conduplicate in bud , acuminate , and penninerved , with closely approximate nerves . The two parts of the leaf are unequal , but this is scarcely discernible in the bud . The broader ...
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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...