On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 1
... half in advance . The protection of the buds is therefore one of the most important requisites in plant lite - in cold countries against frost , in hot against the sun . During winter the young leaves lie snugly enclosed in several warm ...
... half in advance . The protection of the buds is therefore one of the most important requisites in plant lite - in cold countries against frost , in hot against the sun . During winter the young leaves lie snugly enclosed in several warm ...
Pagina 5
... half ; p , from this point to the base the leaves are attached to the axis , and axillary buds arise exactly at this place ; a , axis ; yl , next younger pair of leaves . where the delicate new leaves in the centre of the plant are ...
... half ; p , from this point to the base the leaves are attached to the axis , and axillary buds arise exactly at this place ; a , axis ; yl , next younger pair of leaves . where the delicate new leaves in the centre of the plant are ...
Pagina 37
... half . S , S , connate sheaths of leaves ; A , A , axillary shoots . There are , however , as already mentioned , some other families of plants in which some species have stipules and others have not . For instance , in the ...
... half . S , S , connate sheaths of leaves ; A , A , axillary shoots . There are , however , as already mentioned , some other families of plants in which some species have stipules and others have not . For instance , in the ...
Pagina 47
... half the circumference , thus affording a possible explanation of the fact that , while the cotyledons are opposite , the leaves are in so many cases alternate . The rudimentary leaf consists of undifferentiated cellular tissue , and ...
... half the circumference , thus affording a possible explanation of the fact that , while the cotyledons are opposite , the leaves are in so many cases alternate . The rudimentary leaf consists of undifferentiated cellular tissue , and ...
Pagina 55
... half of the bud , and the middle tooth is slightly the longest . The sixth scale ( fig . 93 ) is the longest , surmounting the bud , and folded round it so as to cover about three - fourths of its surface ; the three teeth are about ...
... half of the bud , and the middle tooth is slightly the longest . The sixth scale ( fig . 93 ) is the longest , surmounting the bud , and folded round it so as to cover about three - fourths of its surface ; the three teeth are about ...
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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
Pasaje populare
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...