An Introduction to BotanyLongman, 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 · 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 · 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 albumen anther apex appears axis bark base become body botanists Botany bracts branches buds bundles called calyx Cand Candolle carbonic acid carpels cause cavity cells cellular tissue centre chalaza character cloth colour common consists containing corolla cotyledons cyclosis developement dicotyledons direction disk Dutrochet Edition embryo epidermis exist extremity fibres filament fleshy flowers fluid foramen fruit glands grains green growing hairs hilum inches integument kind latex layers leaf leaflets leaves light Linnæus lobes Loudon margin matter medullary rays membrane Mirbel monocotyledons nature nitrogen nucleus observed organs ovarium ovary ovule oxygen parenchyma pericarp petals petiole pistil pith placenta plants Plate plumula pollen pollen tube produced quantity radicle Raphides remarked roots round seeds separate side species specimens spiral vessels stamens stem stigma stomates structure substance surface term terminating tion tree tubes vascular vegetable veins wood woody tissue yellow