On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 33
... . They occur not only in Spergula and Spergularia , which are now generally considered as belonging to the Caryo- phyllaceae ( though certain botanists regard them as con- D stituting a separate family ) , but also in most ON STIPULES 33.
... . They occur not only in Spergula and Spergularia , which are now generally considered as belonging to the Caryo- phyllaceae ( though certain botanists regard them as con- D stituting a separate family ) , but also in most ON STIPULES 33.
Pagina 34
Sir John Lubbock. stituting a separate family ) , but also in most of the Polycarpece ; and among the Myrtacea in Calythrix , Couroupita , and perhaps in some other genera . Among other families some genera of which have stipules , while ...
Sir John Lubbock. stituting a separate family ) , but also in most of the Polycarpece ; and among the Myrtacea in Calythrix , Couroupita , and perhaps in some other genera . Among other families some genera of which have stipules , while ...
Pagina 59
... separate leaflets follows different lines . Trecul , moreover , has shown that the development of leaves cannot in all cases be brought under these two categories . In Centaurea , for instance ( fig . 99 ) , the central lobe is formed ...
... separate leaflets follows different lines . Trecul , moreover , has shown that the development of leaves cannot in all cases be brought under these two categories . In Centaurea , for instance ( fig . 99 ) , the central lobe is formed ...
Pagina 105
... separate from their leaf from the first one onwards , even in the bud stage . The stipules are deciduous , falling before the end of the summer . MAPLE ( Acer ) In species which have no stipules there is nothing to distinguish the base ...
... separate from their leaf from the first one onwards , even in the bud stage . The stipules are deciduous , falling before the end of the summer . MAPLE ( Acer ) In species which have no stipules there is nothing to distinguish the base ...
Pagina 115
... separates more or less completely from the coria- ceous outer one , and resembles a second scale . It is , however , exactly opposite to the outer layer of the scale ( not alternate ) , and is divided in the same way as the outer layer ...
... separates more or less completely from the coria- ceous outer one , and resembles a second scale . It is , however , exactly opposite to the outer layer of the scale ( not alternate ) , and is divided in the same way as the outer layer ...
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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.