On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 14
... rest of the space is occu- pied by the young leaf , which is conduplicate , or folded on itself down the middle , like a sheet of notepaper , and also turned back towards the base of the bud . This unusual position is probably due to ...
... rest of the space is occu- pied by the young leaf , which is conduplicate , or folded on itself down the middle , like a sheet of notepaper , and also turned back towards the base of the bud . This unusual position is probably due to ...
Pagina 23
... rest of the leaf . ( Pisum sativum ) ( fig . 26 ) are large , oblong - oval , mucronate , unequal - sided , and unequally toothed at one side . They cover the rest of their own leaf in the young stage and all the rest of the bud . In ...
... rest of the leaf . ( Pisum sativum ) ( fig . 26 ) are large , oblong - oval , mucronate , unequal - sided , and unequally toothed at one side . They cover the rest of their own leaf in the young stage and all the rest of the bud . In ...
Pagina 28
... rest of the leaf and protect the next succeeding bud , as , for instance , in Petteria ( figs . 35 , 36 ) ; or they may last indefinitely , as in Robinia . SC S SC S FIG . 33. - ROBINIA VISCOSA . size . Nat . s , s , spiny stipules ...
... rest of the leaf and protect the next succeeding bud , as , for instance , in Petteria ( figs . 35 , 36 ) ; or they may last indefinitely , as in Robinia . SC S SC S FIG . 33. - ROBINIA VISCOSA . size . Nat . s , s , spiny stipules ...
Pagina 29
Sir John Lubbock. When stipules survive the rest of the leaf to which they belong , this generally has reference to the protec- tion of the buds . Thus , in Magnolia Umbrella the leaf terminating each year's growth is small , and ...
Sir John Lubbock. When stipules survive the rest of the leaf to which they belong , this generally has reference to the protec- tion of the buds . Thus , in Magnolia Umbrella the leaf terminating each year's growth is small , and ...
Pagina 51
... rest and forms the leaf - stalk ; the two side pieces become the stipules . They grow upwards and inwards , finally forming a hood over the growing - point . About the time when 80 81 82 TULIP TREE ( Liriodendron tulipifera ) . FIG . 80 ...
... rest and forms the leaf - stalk ; the two side pieces become the stipules . They grow upwards and inwards , finally forming a hood over the growing - point . About the time when 80 81 82 TULIP TREE ( Liriodendron tulipifera ) . FIG . 80 ...
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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...