On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 28
... persistent . Thus , in the Black Poplar ( Populus nigra ) , ( fig . 37 ) the stipules of the upper leaf often survive the leaf- blade , which drops off in autumn , while they retain their place and protect the young bud through the ...
... persistent . Thus , in the Black Poplar ( Populus nigra ) , ( fig . 37 ) the stipules of the upper leaf often survive the leaf- blade , which drops off in autumn , while they retain their place and protect the young bud through the ...
Pagina 30
... persistent base of petiole . st FIG . 39 . St FIG . 40 . PORTION OF SHOOT OF ASTRAGALUS CHINENSIS , showing stipules ( St ) connate at the base . Nat . size . FIG . 39. - Front view . FIG . 40. - Side view . Two leaflets of the compound ...
... persistent base of petiole . st FIG . 39 . St FIG . 40 . PORTION OF SHOOT OF ASTRAGALUS CHINENSIS , showing stipules ( St ) connate at the base . Nat . size . FIG . 39. - Front view . FIG . 40. - Side view . Two leaflets of the compound ...
Pagina 76
... persistent sheathing pedestals , one of which , p , is slightly opened to show the axillary bud it covers . In Kalmia latifolia , for instance ( figs . 116-119 ) , the axis of every shoot produces an outgrowth opposite the dilated ...
... persistent sheathing pedestals , one of which , p , is slightly opened to show the axillary bud it covers . In Kalmia latifolia , for instance ( figs . 116-119 ) , the axis of every shoot produces an outgrowth opposite the dilated ...
Pagina 81
... persistent pedestal of leaf . In Spartium junceum ( figs . 123 , 124 ) there are no stipules , but the bud is protected by the enlarged , concave , persistent pedestals of the last year's leaves . A similar arrangement occurs in the ...
... persistent pedestal of leaf . In Spartium junceum ( figs . 123 , 124 ) there are no stipules , but the bud is protected by the enlarged , concave , persistent pedestals of the last year's leaves . A similar arrangement occurs in the ...
Pagina 82
... persistent and elongated pedestal of the leaf . The winter - bud is also protected by scales , consisting of reduced leaves , on which the stipules are scarcely perceptible . In Genista antarctica and G. sagittalis the stipules are ...
... persistent and elongated pedestal of the leaf . The winter - bud is also protected by scales , consisting of reduced leaves , on which the stipules are scarcely perceptible . In Genista antarctica and G. sagittalis the stipules are ...
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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...