On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 17
... stage of growth , become quiescent , and are gradually 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 ...
... stage of growth , become quiescent , and are gradually 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 ...
Pagina 23
... stage and all the rest of the bud . In the Pansy ( fig . 27 ) they are large , oblong , and pinnatifid , with 3-6 linear lobes on the ex- ternal side . In Hymenanthera ( fig . 28 ) , a FIG . 27. - LEAF OF PANSY Three - fourths nat ...
... stage and all the rest of the bud . In the Pansy ( fig . 27 ) they are large , oblong , and pinnatifid , with 3-6 linear lobes on the ex- ternal side . In Hymenanthera ( fig . 28 ) , a FIG . 27. - LEAF OF PANSY Three - fourths nat ...
Pagina 31
... stage lie between two rows of stipules . In Sainfoin ( Onobrychis sativa ) ( figs . 43 , 44 ) also the stipules are united for the greater part of their length . In other species they are ' intrapetiolar , ' more or less connate on the ...
... stage lie between two rows of stipules . In Sainfoin ( Onobrychis sativa ) ( figs . 43 , 44 ) also the stipules are united for the greater part of their length . In other species they are ' intrapetiolar , ' more or less connate on the ...
Pagina 51
... stage , x 20 . FIG . 82.-Do. do . rather more advanced stage , × 20 . the stipules meet the leaf - blade commences . It is at first a very narrow , delicate , hyaline membrane . The bud then assumes the appearance shown in fig . 80 ...
... stage , x 20 . FIG . 82.-Do. do . rather more advanced stage , × 20 . the stipules meet the leaf - blade commences . It is at first a very narrow , delicate , hyaline membrane . The bud then assumes the appearance shown in fig . 80 ...
Pagina 57
... stage of the bud in winter , the stipules being adnate along the whole length of the midrib , so that the lamina of the leaf is sessile . The above description was made from an average bud on a strong shoot . Buds on weak shoots have ...
... stage of the bud in winter , the stipules being adnate along the whole length of the midrib , so that the lamina of the leaf is sessile . The above description was made from an average bud on a strong shoot . Buds on weak shoots have ...
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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...