On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 5
... 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 protected by the large , horizontally spreading , older ones . Figs . 3 ...
... 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 protected by the large , horizontally spreading , older ones . Figs . 3 ...
Pagina 34
... axis , and with the next higher pair ( St3 ) covering the terminal bud . the Onagrarieæ , Saxifrageæ , Geraniacea , Leguminosæ , Sapindaceae , and Euphorbiaceae . Moreover , as pointed out in the above passage from Vaucher , there are ...
... axis , and with the next higher pair ( St3 ) covering the terminal bud . the Onagrarieæ , Saxifrageæ , Geraniacea , Leguminosæ , Sapindaceae , and Euphorbiaceae . Moreover , as pointed out in the above passage from Vaucher , there are ...
Pagina 38
... axis ; 7 , portion of leaf ; sh , sheath formed by the dilated and connate bases of the petioles ; ab , ab , axillary buds . The Rosacea generally have stipules , but in Exo- chorda some species are exstipulate . In Exochorda Alberti ...
... axis ; 7 , portion of leaf ; sh , sheath formed by the dilated and connate bases of the petioles ; ab , ab , axillary buds . The Rosacea generally have stipules , but in Exo- chorda some species are exstipulate . In Exochorda Alberti ...
Pagina 61
... - point , A. The youngest ridge ( o ' ) is still incomplete . runs round the whole axis immediately below the grow- ing - point . At one place it raises itself more than elsewhere , DEVELOPMENT OF LEAVES AND STIPULES 61.
... - point , A. The youngest ridge ( o ' ) is still incomplete . runs round the whole axis immediately below the grow- ing - point . At one place it raises itself more than elsewhere , DEVELOPMENT OF LEAVES AND STIPULES 61.
Pagina 64
... axis would thus become folded on itself . In pinnate leaves generally , as in those of the Rose , each leaflet is conduplicate . In palmate leaves the folded arrangement is that naturally best calculated to enable them to fit into the ...
... axis would thus become folded on itself . In pinnate leaves generally , as in those of the Rose , each leaflet is conduplicate . In palmate leaves the folded arrangement is that naturally best calculated to enable them to fit into the ...
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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...