An Introduction to BotanyLongman, Orme, Brown, Green, and Longmans, 1839 - 594 páginas |
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Página 3
... trees , where he found a successive addition of strata to the lining of the cavities of the cells ; and is appa- rently an universal occurrence where membrane becomes thickened . But the matter added to membrane is often so homogeneous ...
... trees , where he found a successive addition of strata to the lining of the cavities of the cells ; and is appa- rently an universal occurrence where membrane becomes thickened . But the matter added to membrane is often so homogeneous ...
Página 5
... trees are passages ( meatus ) in the thickness of the membrane , opening into the cavity of the cells , and closed externally by the membrane itself . He adds , that when dotted tissue is in contact , these passages are placed exactly ...
... trees are passages ( meatus ) in the thickness of the membrane , opening into the cavity of the cells , and closed externally by the membrane itself . He adds , that when dotted tissue is in contact , these passages are placed exactly ...
Página 24
... tree , it seemed to me to consist of a bundle of yet finer fibres ; and when I have detached one of those fibres ... trees of hot 1 countries . The sides of woody tissue become thickened , 24 BOOK I. ORGANOGRAPHY .
... tree , it seemed to me to consist of a bundle of yet finer fibres ; and when I have detached one of those fibres ... trees of hot 1 countries . The sides of woody tissue become thickened , 24 BOOK I. ORGANOGRAPHY .
Página 26
... trees . At Plate II . fig . 20. is a view of it as I see it in Sphærostema . The nature of the disks has been examined by M. Guil- lemin , who , in a paper laid before the Academy of Sciences , Dec. 19 , 1836 , considers them to be ...
... trees . At Plate II . fig . 20. is a view of it as I see it in Sphærostema . The nature of the disks has been examined by M. Guil- lemin , who , in a paper laid before the Academy of Sciences , Dec. 19 , 1836 , considers them to be ...
Página 31
... trees , especially in the winter , a beautiful sight may be observed , by tearing gently asunder a portion of a branch or stem still green , so as to separate the coils of the spires . The fibre will be found to have a peristaltic ...
... trees , especially in the winter , a beautiful sight may be observed , by tearing gently asunder a portion of a branch or stem still green , so as to separate the coils of the spires . The fibre will be found to have a peristaltic ...
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Palavras e frases frequentes
Adolphe Brongniart anther apex appears arranged axis bark base become bladders body botanists bracts branches brown buds bundles called calyx Candolle carbonic acid carpels cavity cells cellular tissue centre chalaza colour colourless common considered consists corolla cotyledons dehiscence developement dicotyledons direction disk dissepiments distinct Dutrochet elongated embryo Endogens epidermis exist Exogens external extremity fibres fleshy flowers fluid fruit glands grains granules green growing hairs hilum indehiscent inflorescence integument kind layers leaf leaflets leaves Linnæus lobes margin matter medullary rays membrane midrib Mirb Mirbel modifications Mohl monocotyledons nature nucleus observations organs ovary ovule oxygen parenchyma peculiar pericarp petals petiole pistil pith placenta plants Plate pollen produced quantity radicle receptacle remarkable roots round seeds separate side sometimes species spiral vessels sporangium stamens stem stigma stomates structure substance surface term terminating tion tree tubes valves vascular vegetable veins wood woody tissue yellow
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