On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 2
... ( lower ) leaf , which had only a single 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 ...
... ( lower ) leaf , which had only a single 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 ...
Pagina 5
... lower half ; p , from this point to the base the leaves are attached to the axis , and axillary buds arise exactly at this place ; a , axis ; yl , next younger pair of leaves . where the delicate new leaves in the centre of the plant ...
... lower half ; p , from this point to the base the leaves are attached to the axis , and axillary buds arise exactly at this place ; a , axis ; yl , next younger pair of leaves . where the delicate new leaves in the centre of the plant ...
Pagina 10
... lower ones grow , and the upper part of the stem dies back . The arrangement of the leaf in the bud influences , and sometimes determines , the form of the leaf . This consideration explains , I think , the curious fact that the first ...
... lower ones grow , and the upper part of the stem dies back . The arrangement of the leaf in the bud influences , and sometimes determines , the form of the leaf . This consideration explains , I think , the curious fact that the first ...
Pagina 36
... lower ones have none . Now the lower leaves have broad leaf - bases , which effectually protect the bud , and they are exstipulate ; the upper leaves , on the contrary , are narrow at the base , but they are provided with stipules . The ...
... lower ones have none . Now the lower leaves have broad leaf - bases , which effectually protect the bud , and they are exstipulate ; the upper leaves , on the contrary , are narrow at the base , but they are provided with stipules . The ...
Pagina 39
... . The petiole of the lower leaves also sometimes shows short teeth at its upper end , which also probably represent the last trace of stipules . Among the Magnoliacea , some genera have stipules , while ON STIPULES 39.
... . The petiole of the lower leaves also sometimes shows short teeth at its upper end , which also probably represent the last trace of stipules . Among the Magnoliacea , some genera have stipules , while ON STIPULES 39.
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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
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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...