On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 10
... narrow , entire or much divided . Now , why should the first leaves differ so much from their successors ? The reason , I believe , is that while the forms of leaves often depend greatly on the Philosophia Botanica . buds , those of ...
... narrow , entire or much divided . Now , why should the first leaves differ so much from their successors ? The reason , I believe , is that while the forms of leaves often depend greatly on the Philosophia Botanica . buds , those of ...
Pagina 36
... narrow at the base , but they are provided with stipules . The reason for the presence or absence of stipules seems , then , quite obvious , so far as the Rock Roses ( Helianthemum ) are concerned . Let us now see whether the ...
... narrow at the base , but they are provided with stipules . The reason for the presence or absence of stipules seems , then , quite obvious , so far as the Rock Roses ( Helianthemum ) are concerned . Let us now see whether the ...
Pagina 37
... narrow petioles , while in the other genera- Dianthus , Tunica , Gypsophila , Saponaria , Silene , Lychnis , Cerastium , Arenaria , Sagina , & c . - containing a very large number of species , the basal part of the leaves is always more ...
... narrow petioles , while in the other genera- Dianthus , Tunica , Gypsophila , Saponaria , Silene , Lychnis , Cerastium , Arenaria , Sagina , & c . - containing a very large number of species , the basal part of the leaves is always more ...
Pagina 51
... narrow , delicate , hyaline membrane . The bud then assumes the appearance shown in fig . 80 . The next stage ( fig . 81 ) shows the growth of the leaf - blade , which is more developed in fig . 82. Fig . 17 , p . 14 , shows how closely ...
... narrow , delicate , hyaline membrane . The bud then assumes the appearance shown in fig . 80 . The next stage ( fig . 81 ) shows the growth of the leaf - blade , which is more developed in fig . 82. Fig . 17 , p . 14 , shows how closely ...
Pagina 56
... are represented by small or narrow teeth , crowded together . The stipules are now well developed , and much larger in proportion to the rest of the organ than in previous cases . The second leaf , occurring at 56 BUDS AND STIPULES.
... are represented by small or narrow teeth , crowded together . The stipules are now well developed , and much larger in proportion to the rest of the organ than in previous cases . The second leaf , occurring at 56 BUDS AND STIPULES.
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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.