On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 24
... are even more minute , as in the Holly ( Ilex Aquifolium ) ( fig . 29 ) . Here they are perhaps functionless ; the mere rudiments of once larger organs . In other cases , however , as for instance in 24 BUDS AND STIPULES.
... are even more minute , as in the Holly ( Ilex Aquifolium ) ( fig . 29 ) . Here they are perhaps functionless ; the mere rudiments of once larger organs . In other cases , however , as for instance in 24 BUDS AND STIPULES.
Pagina 43
... larger organ which at one time performed some useful pur- pose in the economy of the animal or plant . This suggestion , however , seems untenable in the present case , because , as a matter of fact , we do not find that the stipuliform ...
... larger organ which at one time performed some useful pur- pose in the economy of the animal or plant . This suggestion , however , seems untenable in the present case , because , as a matter of fact , we do not find that the stipuliform ...
Pagina 48
... larger in proportion than in the full - grown leaf . COMMON LAUREL The subjoined figures illustrate the structure of the bud of a Common Laurel ( Cerasus Laurocerasus ) . Here again the leaf commences as a small projection or 48 BUDS ...
... larger in proportion than in the full - grown leaf . COMMON LAUREL The subjoined figures illustrate the structure of the bud of a Common Laurel ( Cerasus Laurocerasus ) . Here again the leaf commences as a small projection or 48 BUDS ...
Pagina 50
... larger one becoming rather more ( fig . 70 ) , the shorter one rather less , than double as long as the leaf - blade . Then comes a some- what abrupt transition , and the outer scales do not , of course , correspond to stages in the ...
... larger one becoming rather more ( fig . 70 ) , the shorter one rather less , than double as long as the leaf - blade . Then comes a some- what abrupt transition , and the outer scales do not , of course , correspond to stages in the ...
Pagina 55
... larger , and rounded at the apex , or occasionally emarginate by the breaking away of the tip , and more or less strongly carinate . The 89 90 91 92 93 94 BUD - SCALES OF ROSA CANINA , × 2 . FIG . 89 , first scale ; FIG . 90 , third do ...
... larger , and rounded at the apex , or occasionally emarginate by the breaking away of the tip , and more or less strongly carinate . The 89 90 91 92 93 94 BUD - SCALES OF ROSA CANINA , × 2 . FIG . 89 , first scale ; FIG . 90 , third do ...
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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...