On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 17
... remain in the same state for years , but if the growing shoots are injured in the struggle for existence these reserves are called into the field . Their presence is often connected with that of thorns , as in Robinia , Gleditschia ...
... remain in the same state for years , but if the growing shoots are injured in the struggle for existence these reserves are called into the field . Their presence is often connected with that of thorns , as in Robinia , Gleditschia ...
Pagina 18
... remain in the ground . Such shoots are also common in Poplars , Limes , many fruit trees , & c . Accidental adventive buds are those which appear if the plant is maimed or wounded ; or if a leaf , say of Begonia , is detached from the ...
... remain in the ground . Such shoots are also common in Poplars , Limes , many fruit trees , & c . Accidental adventive buds are those which appear if the plant is maimed or wounded ; or if a leaf , say of Begonia , is detached from the ...
Pagina 67
... remain horizontal at night suffered much more injury from frost than those which were allowed to assume their normal vertical position . ' 1 ' We exposed on two occasions during the summer to a clear sky several pinned - open leaflets ...
... remain horizontal at night suffered much more injury from frost than those which were allowed to assume their normal vertical position . ' 1 ' We exposed on two occasions during the summer to a clear sky several pinned - open leaflets ...
Pagina 74
... remain erect for a consider- able time , and being closely applied face to face , A FIG . 111 . B B FIG . 112 . NEGUNDO ACEROIDES . Nat . size . FIG . 111. - Portion of shoot ( A ) with the bases of the two opposite leaf - stalks ( P ) ...
... remain erect for a consider- able time , and being closely applied face to face , A FIG . 111 . B B FIG . 112 . NEGUNDO ACEROIDES . Nat . size . FIG . 111. - Portion of shoot ( A ) with the bases of the two opposite leaf - stalks ( P ) ...
Pagina 94
... remain a simple pointed hair , while another develops a gland . The glandular processes are sometimes highly deve- loped ; as , for instance , in the Rose and the Violet , where they are large and oval , one being formed at the tip of ...
... remain a simple pointed hair , while another develops a gland . The glandular processes are sometimes highly deve- loped ; as , for instance , in the Rose and the Violet , where they are large and oval , one being formed at the tip of ...
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Termeni și expresii frecvente
apex axil axillary buds axis base Beech blade brown bud is protected bud-scales Candolle completely covered concave conduplicate connate stipules cotyledons developed edges Edition Exochorda exstipulate fifth folded foliaceous fourth genera genus glabrous glands growing-point growth Guaiacum officinale hairs hairy Helianthemum Hornbeam Horse Chestnut inner instance lamina Lantana lateral buds 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 shoot showing side slightly Smilax sometimes species St FIG St St stalk stem stipular stipules belonging stipules fig stipules St subulate tendrils terminal bud trees triangular Tulip Tree upper Viburnum Viburnum Lantana Viburnum Opulus Whitebeam winter winter-bud Wych Elm young bud young leaves younger
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Pagina 233 - So careless of the single life, So careful of the type she seems, and will be more and more struck with wonder and admiration at the variety and beauty of the provisions by which Nature preserves these tender and precious buds from the severity of winter, and prepares with loving care and rich profusion for the bright promise of spring and the glorious pageant of summer.
Pagina 194 - ASSISTANCE IN CLIMBING There are two ways in which stipules may assist in this respect, viz. (1) by being developed into tendrils, or (2) into more or less reversed spines. The case of the tendrils of Smilax is one which has occasioned much discussion, but I agree with Tyler (24) that the embryological, together with the anatomical, characters indicate that in Smilax the tendrils are true stipules, found in connection with the sheathing petiole. In Paliurvs australis (fig.
Pagina 4 - The figure also shows how admirably the peculiar form of the leaf is adapted to their mode of growth. In many other plants also the leaves, as they develop, successively protect the younger ones. A somewhat similar case is afforded by Uvaria (figs. 105, 106, p. 70) ; and also by common Rhubarb, FIG.