On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina vii
... Position of Stipules - Differences in allied Species : Elder- Differences in same Species : Hawthorn - Use of Stipules : Robinia , Petteria , Poplar , Magnolia , Astragalus , Hedysarum , Pondweed , Knotweed , Hop , Spergularia ...
... Position of Stipules - Differences in allied Species : Elder- Differences in same Species : Hawthorn - Use of Stipules : Robinia , Petteria , Poplar , Magnolia , Astragalus , Hedysarum , Pondweed , Knotweed , Hop , Spergularia ...
Pagina viii
... Position as- sumed by Buds - Diminution of Radiation - Darwin's Sug- gestion - Protection by Leaf - base , by Modified Leaves , by Leaf - stalk , by Stipules , by Connate Stipules , by Spines , by Hair , by Gum or Resin - Protection by ...
... Position as- sumed by Buds - Diminution of Radiation - Darwin's Sug- gestion - Protection by Leaf - base , by Modified Leaves , by Leaf - stalk , by Stipules , by Connate Stipules , by Spines , by Hair , by Gum or Resin - Protection by ...
Pagina 14
... position of the leaves on the tree . I believe , however , that the cause is of a different nature , and has reference to the peculiar character of the bud . a ¿ FIG . 17. - DIAGRAM SHOW- ING ARRANGEMENT THE OF sor . Each young leaf is ...
... position of the leaves on the tree . I believe , however , that the cause is of a different nature , and has reference to the peculiar character of the bud . a ¿ FIG . 17. - DIAGRAM SHOW- ING ARRANGEMENT THE OF sor . Each young leaf is ...
Pagina 23
... position ; B , one stipule turned back , showing the 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 ...
... position ; B , one stipule turned back , showing the 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 ...
Pagina 64
... positions . The conduplicate arrangement seems to follow natu- rally from the mode of development described on p . 47 . The rudiment of the leaf , spreading more or less round the growing - point , assumes a hollow form , and when it ...
... positions . The conduplicate arrangement seems to follow natu- rally from the mode of development described on p . 47 . The rudiment of the leaf , spreading more or less round the growing - point , assumes a hollow form , and when it ...
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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.