On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 10
... narrow , entire or much divided . Now , why should the first leaves differ so much from their successors ? The reason , I believe , is that while the forms of leaves often depend greatly on the ' Philosophia Botanica . buds , those of ...
... narrow , entire or much divided . Now , why should the first leaves differ so much from their successors ? The reason , I believe , is that while the forms of leaves often depend greatly on the ' Philosophia Botanica . buds , those of ...
Pagina 36
... narrow at the base , but they are provided with stipules . The reason for the presence or absence of stipules seems , then , quite obvious , so far as the Rock Roses ( Helianthemum ) are concerned . Let us now see whether the ...
... narrow at the base , but they are provided with stipules . The reason for the presence or absence of stipules seems , then , quite obvious , so far as the Rock Roses ( Helianthemum ) are concerned . Let us now see whether the ...
Pagina 37
... narrow petioles , while in the other genera― Dianthus , Tunica , Gypsophila , Saponaria , Silene , Lychnis , Cerastium , Arenaria , Sagina , & c . - containing a very large number of species , the basal part of the leaves is always more ...
... narrow petioles , while in the other genera― Dianthus , Tunica , Gypsophila , Saponaria , Silene , Lychnis , Cerastium , Arenaria , Sagina , & c . - containing a very large number of species , the basal part of the leaves is always more ...
Pagina 51
... narrow , delicate , hyaline membrane . The bud then assumes the appearance shown in fig . 80 . The next stage ( fig . 81 ) shows the growth of the leaf - blade , which is more developed in fig . 82. Fig . 17 , p . 14 , shows how closely ...
... narrow , delicate , hyaline membrane . The bud then assumes the appearance shown in fig . 80 . The next stage ( fig . 81 ) shows the growth of the leaf - blade , which is more developed in fig . 82. Fig . 17 , p . 14 , shows how closely ...
Pagina 56
... are represented by small or narrow teeth , crowded together . The stipules are now well developed , and much larger in proportion to the rest of the organ than in previous cases . The second leaf , occurring at 56 BUDS AND STIPULES.
... are represented by small or narrow teeth , crowded together . The stipules are now well developed , and much larger in proportion to the rest of the organ than in previous cases . The second leaf , occurring at 56 BUDS AND STIPULES.
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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...