On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 17
... appear to have been In such cases as , for in- first noticed by Tristan ( 3 ) . stance , the Robinia ( ' Acacia ' ) all but one of these , after attaining a certain stage of growth , become quiescent , and are gradually covered over by ...
... appear to have been In such cases as , for in- first noticed by Tristan ( 3 ) . stance , the Robinia ( ' Acacia ' ) all but one of these , after attaining a certain stage of growth , become quiescent , and are gradually covered over by ...
Pagina 18
... appear from the parent emphasises the great length of the roots . Similarly , when a tree is cut down the ground becomes covered with a thick growth of young shoots , springing up rapidly , at the expense of the nourish- ment stored up ...
... appear from the parent emphasises the great length of the roots . Similarly , when a tree is cut down the ground becomes covered with a thick growth of young shoots , springing up rapidly , at the expense of the nourish- ment stored up ...
Pagina 19
Sir John Lubbock. applies to Dandelions or Plantains . The natural adventive buds appear on definite parts of the plant , according to the species ; in accidental adventive buds the place of origin depends on that of the injury . FIG ...
Sir John Lubbock. applies to Dandelions or Plantains . The natural adventive buds appear on definite parts of the plant , according to the species ; in accidental adventive buds the place of origin depends on that of the injury . FIG ...
Pagina 40
... appear to consist of flattened petioles , with a membranous margin representing stipules , free only at the tip . The true leaves follow the scales abruptly . Another very interesting case is that of Viburnum . ' We have in this country ...
... appear to consist of flattened petioles , with a membranous margin representing stipules , free only at the tip . The true leaves follow the scales abruptly . Another very interesting case is that of Viburnum . ' We have in this country ...
Pagina 43
... appears to have no definite function , we naturally ask ourselves whether it is the disappearing relic of some larger ... appear to be the form typical or original to the genus . Now let us suppose that , either from having extended ...
... appears to have no definite function , we naturally ask ourselves whether it is the disappearing relic of some larger ... appear to be the form typical or original to the genus . Now let us suppose that , either from having extended ...
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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.