On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 98
... corresponding leaf , exposed ; St , the stipule of the next leaf ; the upper bud shows only one stipule , St , but none have fallen in this instance , which is the more common case . Nat . size . FIG . 143. - Transverse section of bud ...
... corresponding leaf , exposed ; St , the stipule of the next leaf ; the upper bud shows only one stipule , St , but none have fallen in this instance , which is the more common case . Nat . size . FIG . 143. - Transverse section of bud ...
Pagina 102
... corresponding to a , therefore , is useless and wasted . Another species ( Magnolia Umbrella ) ( figs . 152 , 153 ) avoids this waste of power and material . When the last leaf of the year dies and drops off , the stipules belonging to ...
... corresponding to a , therefore , is useless and wasted . Another species ( Magnolia Umbrella ) ( figs . 152 , 153 ) avoids this waste of power and material . When the last leaf of the year dies and drops off , the stipules belonging to ...
Pagina 114
... corresponding to the line of union , as in S. alba and S. cinerea . In S. cordata there is a wide shallow groove at the same place . 3. The anterior face during the expansion of the buds in spring becomes emarginate , bidentate , or ...
... corresponding to the line of union , as in S. alba and S. cinerea . In S. cordata there is a wide shallow groove at the same place . 3. The anterior face during the expansion of the buds in spring becomes emarginate , bidentate , or ...
Pagina 117
... corresponding to the midrib . Three or five veins may be seen on the inner face , corresponding to the principal vascular bundles running through the petiole into the lobes of the lamina . Three of them generally terminate in gland ...
... corresponding to the midrib . Three or five veins may be seen on the inner face , corresponding to the principal vascular bundles running through the petiole into the lobes of the lamina . Three of them generally terminate in gland ...
Pagina 179
... corresponding to leaf and stipules . The third and fourth leaves are compound , with one pair of leaflets and obliquely ovate stipules of considerable size , and having FIG . 304. - LATHYRUS APHACA . a tendril represented by a small ...
... corresponding to leaf and stipules . The third and fourth leaves are compound , with one pair of leaflets and obliquely ovate stipules of considerable size , and having FIG . 304. - LATHYRUS APHACA . a tendril represented by a small ...
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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...