On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 9
... true terminal bud , which has dropped away , so that the one which is apparently terminal is really axil- lary . Fig . 11 represents the end of a shoot of Hornbeam ( Carpinus Betulus ) , taken in July , and shows how snugly the bud ...
... true terminal bud , which has dropped away , so that the one which is apparently terminal is really axil- lary . Fig . 11 represents the end of a shoot of Hornbeam ( Carpinus Betulus ) , taken in July , and shows how snugly the bud ...
Pagina 10
... true leaves . They offer an immense variety of form ; not quite so innumerable , indeed , as those of true leaves , of which Linnæus truly observed that ' Natura in nullâ parte magis fuit polymorpha quam in foliis , ' but still immense ...
... true leaves . They offer an immense variety of form ; not quite so innumerable , indeed , as those of true leaves , of which Linnæus truly observed that ' Natura in nullâ parte magis fuit polymorpha quam in foliis , ' but still immense ...
Pagina 40
... true leaves follow the scales abruptly . Another very interesting case is that of Viburnum.1 We have in this country two wild species of this genus - one , Viburnum Lantana ( usually known as the Wayfaring Tree ) ( fig . 55 ) ; the ...
... true leaves follow the scales abruptly . Another very interesting case is that of Viburnum.1 We have in this country two wild species of this genus - one , Viburnum Lantana ( usually known as the Wayfaring Tree ) ( fig . 55 ) ; the ...
Pagina 44
... true leaves should be folded , because they thus occupy less space . This , perhaps , accounts for the folding of the L St leaves of V. Opulus in the bud , while the lobes follow from the mode in which the leaves are folded . Now a leaf ...
... true leaves should be folded , because they thus occupy less space . This , perhaps , accounts for the folding of the L St leaves of V. Opulus in the bud , while the lobes follow from the mode in which the leaves are folded . Now a leaf ...
Pagina 54
... true petiole is the leaf - stalk above the stipules . The winged part below is really a develop- ment of the leaf - base . Adnate stipules , as these are called , arising from a similar development of the leaf - base , occur in many Sc4 ...
... true petiole is the leaf - stalk above the stipules . The winged part below is really a develop- ment of the leaf - base . Adnate stipules , as these are called , arising from a similar development of the leaf - base , occur in many Sc4 ...
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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...