On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 2
... considerable difference be- tween terminal and axillary buds , as , for instance , in the Black Poplar ( Populus nigra ) . FIG . 1. - YOUNG SHOOT OF TULIP TREE ( Lirioden- dron ) , 1 nat . size . The following figure ( fig . 1 ) ...
... considerable difference be- tween terminal and axillary buds , as , for instance , in the Black Poplar ( Populus nigra ) . FIG . 1. - YOUNG SHOOT OF TULIP TREE ( Lirioden- dron ) , 1 nat . size . The following figure ( fig . 1 ) ...
Pagina 17
... two classes - natural and accidental . Natural adventive buds are formed by Cardamine pratensis , Dentaria bulbifera , Bryophyllum calycinum , C a considerable number of Dicotyledonous and Mono- cotyledonous plants , ON BUDS 17.
... two classes - natural and accidental . Natural adventive buds are formed by Cardamine pratensis , Dentaria bulbifera , Bryophyllum calycinum , C a considerable number of Dicotyledonous and Mono- cotyledonous plants , ON BUDS 17.
Pagina 18
... considerable distance at which they 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 ...
... considerable distance at which they 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 ...
Pagina 21
... considerable interest , and might be asked with reference to several other groups besides the genus Helianthemum . The results of my observations have been embodied in several Memoirs which the Linnean Society has done me the honour to ...
... considerable interest , and might be asked with reference to several other groups besides the genus Helianthemum . The results of my observations have been embodied in several Memoirs which the Linnean Society has done me the honour to ...
Pagina 64
... considerable differences be- tween nearly allied species ; and in some cases the outer and inner leaves of the bud assume different positions . The conduplicate arrangement seems to follow natu- rally from the mode of development ...
... considerable differences be- tween nearly allied species ; and in some cases the outer and inner leaves of the bud assume different positions . The conduplicate arrangement seems to follow natu- rally from the mode of development ...
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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.