On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina viii
... Hairs : Polygonum amphibium , Viburnum , Horse Chestnut , Plane , Stachys , Nettle - Protection by Gum or Resin : Horse Chestnut , Poplar , Hazel Nut , Honeysuckle , Currant , Hornbeam , Elder , Alder , Violet , Salvia , Dock , Rhubarb ...
... Hairs : Polygonum amphibium , Viburnum , Horse Chestnut , Plane , Stachys , Nettle - Protection by Gum or Resin : Horse Chestnut , Poplar , Hazel Nut , Honeysuckle , Currant , Hornbeam , Elder , Alder , Violet , Salvia , Dock , Rhubarb ...
Pagina xiv
... Hairs in Lilac ( after Hanstein ) 140 , 141 Development of Glandular Hairs in Plane ( after 142-148 Hanstein ) . Winter - buds of Alder . Bud of Magnolia Umbrella 149-151 Bud Protection in Magnolia Yulan 152 , 153 154-160 Bud of Rose ...
... Hairs in Lilac ( after Hanstein ) 140 , 141 Development of Glandular Hairs in Plane ( after 142-148 Hanstein ) . Winter - buds of Alder . Bud of Magnolia Umbrella 149-151 Bud Protection in Magnolia Yulan 152 , 153 154-160 Bud of Rose ...
Pagina 1
... hairs , and often still further protected from insects and browsing quadrupeds by gummy or resinous secretions . The bud is a short shoot bearing a number of young leaves closely packed together . There is generally one B at the summit ...
... hairs , and often still further protected from insects and browsing quadrupeds by gummy or resinous secretions . The bud is a short shoot bearing a number of young leaves closely packed together . There is generally one B at the summit ...
Pagina 7
... hairs . In the Plane ( fig . 7 ) the base of the leaf - stalk is hollowed out , forming a sort of cup or extinguisher , which completely covers the young bud . By the time the leaf drops the outer envelopes of the bud are suf- FIG . 8 ...
... hairs . In the Plane ( fig . 7 ) the base of the leaf - stalk is hollowed out , forming a sort of cup or extinguisher , which completely covers the young bud . By the time the leaf drops the outer envelopes of the bud are suf- FIG . 8 ...
Pagina 42
... hairs affords a sufficient protection ; but the tender young leaves of V. Opulus would afford a tempting food to many cater- pillars and other insects . The ants and wasps which are attracted by the honey would tend to keep them down ...
... hairs affords a sufficient protection ; but the tender young leaves of V. Opulus would afford a tempting food to many cater- pillars and other insects . The ants and wasps which are attracted by the honey would tend to keep them down ...
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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...