On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 33
... 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.
... 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 36
... occur . Helianthemum guttatum is particularly interesting in this respect . The upper leaves have stipules , while the lower ones have none . Now the lower leaves have broad leaf - bases , which effectually protect the bud , and they ...
... occur . Helianthemum guttatum is particularly interesting in this respect . The upper leaves have stipules , while the lower ones have none . Now the lower leaves have broad leaf - bases , which effectually protect the bud , and they ...
Pagina 43
... occur there seems no reason why they should be situated on filiform appendages . On the whole , then , I doubt whether they can be explained as mere honey - glands , or whether , indeed , they are of any actual use when the leaves are ...
... occur there seems no reason why they should be situated on filiform appendages . On the whole , then , I doubt whether they can be explained as mere honey - glands , or whether , indeed , they are of any actual use when the leaves are ...
Pagina 45
... occur in V. Lantana . In support of the above suggestions I may refer to the interesting analogy afforded - in a totally different family - by the genus Spiraea . Here we find some species with entire , some with pinnate leaves ; while ...
... occur in V. Lantana . In support of the above suggestions I may refer to the interesting analogy afforded - in a totally different family - by the genus Spiraea . Here we find some species with entire , some with pinnate leaves ; while ...
Pagina 54
... occur in many Sc4 Sc ' A Sc2 Sc3 Sc5 FIG . 88. - SECTION ACROSS THE BUD OF A ROSE . A , growing - point ; L ' , youngest leaf ; L , three folded lobes of second leaf ; St2 , stipules of second leaf ; Sc1 - Sc , scales . other cases , as ...
... occur in many Sc4 Sc ' A Sc2 Sc3 Sc5 FIG . 88. - SECTION ACROSS THE BUD OF A ROSE . A , growing - point ; L ' , youngest leaf ; L , three folded lobes of second leaf ; St2 , stipules of second leaf ; Sc1 - Sc , scales . other cases , as ...
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Termeni și expresii frecvente
apex axil axillary buds axis base Beech Bentham blade brown Bud Protection bud-scales Candolle completely covered concave conduplicate connate stipules cotyledons developed edges exstipulate fifth folded foliaceous genera genus glabrous glands growing-point growth Guaiacum officinale hairs hairy Helianthemum Hornbeam Horse Chestnut Hypericum calycinum Illustrations inner instance lamina Lantana lateral buds Lathyrus 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 showing side slightly sometimes species St FIG st st stalk stem stipular stipules belonging stipules fig stipules St subulate tendrils terminal bud triangular Tulip Tree upper Viburnum Viburnum Lantana Viburnum Opulus Whitebeam winter winter-bud Wych Elm young bud young leaves Young Shoot younger
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Pagina 191 - The acacia, however, bears hollow thorns, while each leaflet produces honey in a craterformed gland at the base, and a small, sweet, pearshaped body at the tip. In consequence, it is inhabited by myriads of a small ant, which nests in the hollow thorns, and thus finds meat, drink, and lodging all provided for it. These ants are continually roaming over the plant, and constitute a most efficient body-guard, not only driving off the leaf-cutting ants, but, in Belt's opinion, rendering the leaves less...
Pagina 233 - ... the presence, the uses, and the forms of stipules, and the structure of buds in some of our common trees, shrubs, and herbs. If I shall have induced any of my readers to look at them for themselves in the coming spring they will, I am sure, be amply rewarded. They will often be reminded of Tennyson's profound remark about Nature : So careless of the single life, So careful of the type she seems...
Pagina 68 - Plants, p. 286. -purpwrea, 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 dew on the pinned-open leaflets and on those which had gone to sleep was generally conspicuous, the latter being sometimes absolutely dry. whilst the leaflets which had been horizontal were coated with large beads of dew. This shows how much cooler the leaflets fully exposed...