On Buds and StipulesK. Paul, Trench, Trübner & Company, Limited, 1899 - 239 pagini |
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Pagina 26
... inner ones more membranous , and often very delicate , thin , and almost transparent . Others develop into hard , woody spines , as in Robinia ( so - called Acacia ) , & c . ( figs . 33 , 34 ) . As regards the duration of life , some ...
... inner ones more membranous , and often very delicate , thin , and almost transparent . Others develop into hard , woody spines , as in Robinia ( so - called Acacia ) , & c . ( figs . 33 , 34 ) . As regards the duration of life , some ...
Pagina 44
... inner ones ; this is the case with V. Opulus . But that being so , it is an advantage that the inner or true leaves should be folded , because they thus occupy less space . This , perhaps , accounts for the folding of the L حكة leaves ...
... inner ones ; this is the case with V. Opulus . But that being so , it is an advantage that the inner or true leaves should be folded , because they thus occupy less space . This , perhaps , accounts for the folding of the L حكة leaves ...
Pagina 47
... inner side and almost cover over the growing - point . They gradually elongate ( fig . 61 ) , and from being at first slightly curved round the stem , become folded lengthways or con- duplicate DEVELOPMENT OF LEAVES AND STIPULES 47.
... inner side and almost cover over the growing - point . They gradually elongate ( fig . 61 ) , and from being at first slightly curved round the stem , become folded lengthways or con- duplicate DEVELOPMENT OF LEAVES AND STIPULES 47.
Pagina 61
... inner surface of the base of the protecting leaf - stalk . The lower figure ( transverse section ) shows three leaf - ridges ( o1 , 02 , 0 " ) surrounding the growing - point , A. The youngest ridge ( o1 ) is still incomplete . runs ...
... inner surface of the base of the protecting leaf - stalk . The lower figure ( transverse section ) shows three leaf - ridges ( o1 , 02 , 0 " ) surrounding the growing - point , A. The youngest ridge ( o1 ) is still incomplete . runs ...
Pagina 64
... inner leaves of the bud assume different positions . The conduplicate arrangement seems to follow natu- rally from the mode of development described on p . 47 . The rudiment of the leaf , spreading more or less round the growing - point ...
... inner leaves of the bud assume different positions . The conduplicate arrangement seems to follow natu- rally from the mode of development described on p . 47 . The rudiment of the leaf , spreading more or less round the growing - point ...
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Termeni și expresii frecvente
apex axil axillary buds axis base Beech blade brown bud fig bud is protected bud-scales catkin ciliate completely covered concave conduplicate connate stipules cotyledons developed edges Edition fifth folded fourth genera glabrous glands glandular growing-point growth Guaiacum officinale hairs hairy Helianthemum Hornbeam Horse Chestnut inserted instance lamina lateral buds Lathyrus Lathyrus Aphaca Lathyrus Nissolia leaf leaf-base leaf-blade leaf-stalk leaflets leaves and stipules length less lobes lower membranous midrib Monocotyledons narrower nerves node oblong ocrea Opulus outer scales ovate pair of leaves pair of stipules pairs of scales pedestal persistent petiole PLANE Platanus plant Polygonum portion protect the bud protect the young scale fig scar sheath showing side silky sixth slightly smaller Smilax sometimes species st FIG st st stem stipular stipules belonging stipules fig subulate tendrils terminal bud triangular unequal upper Viburnum Viburnum Lantana Viburnum Opulus Whitebeam winter winter-bud Wych Elm young leaves
Pasaje populare
Pagina 233 - Prontenex, the owner stated that for years they followed the same order of succession at both epochs : those which were first to leaf were also the earliest to lose their leaves. A Chestnut in the gardens of the Tuileries from its habit of early leafing is known as the Vingt Mars ; and M. Henri Vilmorin states that, compared with the other Chestnuts in the gardens, it keeps its leaves beyond the mean time of leaf-fall. M. Vilmorin also observed thirty-four Horse Chestnuts, 150 years old, in a plantation...