On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 43
... naturally ask ourselves whether it is the disappearing relic of some larger organ which at one time performed some useful pur- pose in the economy of the animal or plant . This suggestion , however , seems untenable in the present case ...
... naturally ask ourselves whether it is the disappearing relic of some larger organ which at one time performed some useful pur- pose in the economy of the animal or plant . This suggestion , however , seems untenable in the present case ...
Pagina 64
... naturally best calculated to enable them to fit into the bud . The involute and revolute types perhaps have refer- ence to the later life of the leaf , as affording a certain protection against too rapid transpiration . The equitant ...
... naturally best calculated to enable them to fit into the bud . The involute and revolute types perhaps have refer- ence to the later life of the leaf , as affording a certain protection against too rapid transpiration . The equitant ...
Pagina 65
... naturally are as a rule flat ; some- times rolled ; but rarely folded . Pinnate and trifoliate leaves are generally folded . In Monocotyledons the leaf rises as an elevation immediately below the growing - point , gradually sur ...
... naturally are as a rule flat ; some- times rolled ; but rarely folded . Pinnate and trifoliate leaves are generally folded . In Monocotyledons the leaf rises as an elevation immediately below the growing - point , gradually sur ...
Pagina 67
... naturally rise at night , and of Oxalis Movements of Plants , p . 286 . purpurea , which naturally sink at night ( the plants F 2 ON THE PROTECTION OF BUDS 67.
... naturally rise at night , and of Oxalis Movements of Plants , p . 286 . purpurea , which naturally sink at night ( the plants F 2 ON THE PROTECTION OF BUDS 67.
Pagina 68
Sir John Lubbock. purpurea , 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 ...
Sir John Lubbock. purpurea , 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 ...
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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.