On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 5
... edges , which touch all the way round , leaving between them. FIG . 6. - APEX OF SHOOT OF STACHYS SYLVATICA , showing two succes- sive pairs of leaves . Nat . size . FIG . 11. YOUNG SHOOT OF HORN- BEAM ( Carpinus. ON BUDS 5.
... edges , which touch all the way round , leaving between them. FIG . 6. - APEX OF SHOOT OF STACHYS SYLVATICA , showing two succes- sive pairs of leaves . Nat . size . FIG . 11. YOUNG SHOOT OF HORN- BEAM ( Carpinus. ON BUDS 5.
Pagina 6
... edge , very shallowly grooved on the upper surface , FIG . 7. - LEAF OF PLANE ( Platanus ) , showing mode of protection of the young bud . more decidedly so at the base , and connate there , form- ing a sheath 3-5 cm . long , which ...
... edge , very shallowly grooved on the upper surface , FIG . 7. - LEAF OF PLANE ( Platanus ) , showing mode of protection of the young bud . more decidedly so at the base , and connate there , form- ing a sheath 3-5 cm . long , which ...
Pagina 12
... edge from m to h , and then unfolded , the reason for the form of the coty- ledons becomes clear at once . Now let us test this ex- planation by another case . The Wallflower has a seed of similar shape to that of the Radish , though ...
... edge from m to h , and then unfolded , the reason for the form of the coty- ledons becomes clear at once . Now let us test this ex- planation by another case . The Wallflower has a seed of similar shape to that of the Radish , though ...
Pagina 16
... straight in the bud ; those of the Oak have not room to do so , and are , consequently , bent somewhat like a bow along the midrib . Now , if the outer edge were straight , the result would be that when the. 16 BUDS AND STIPULES.
... straight in the bud ; those of the Oak have not room to do so , and are , consequently , bent somewhat like a bow along the midrib . Now , if the outer edge were straight , the result would be that when the. 16 BUDS AND STIPULES.
Pagina 17
... edge must tear . This , however , is avoided by its being thrown into folds ; and this , I believe , accounts for the lobes and bays so characteristic of the Oak leaf . DORMANT AND ADVENTIVE BUDS As a rule each leaf has a single bud in ...
... edge must tear . This , however , is avoided by its being thrown into folds ; and this , I believe , accounts for the lobes and bays so characteristic of the Oak leaf . DORMANT AND ADVENTIVE BUDS As a rule each leaf has a single bud in ...
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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.