An Introduction to BotanyLongman, Orme, Brown, Green, and Longmans, 1839 - 594 páginas |
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Página 19
... centre of some of the bladders of the cellular tissue of many plants there is a roundish nucleus , apparently consisting of granular matter , the nature of which is unknown . It was originally remarked by Francis Bauer , in the vesicles ...
... centre of some of the bladders of the cellular tissue of many plants there is a roundish nucleus , apparently consisting of granular matter , the nature of which is unknown . It was originally remarked by Francis Bauer , in the vesicles ...
Página 25
... centre ( Plate II . fig . 3. ) , which last is what has been described as a pore , the vesicle itself being considered a thickened rim . O O © O O fig . 8 . Kieser figures the glands as pores in Pine- wood ( fig . 8. ) , in Ephedra ...
... centre ( Plate II . fig . 3. ) , which last is what has been described as a pore , the vesicle itself being considered a thickened rim . O O © O O fig . 8 . Kieser figures the glands as pores in Pine- wood ( fig . 8. ) , in Ephedra ...
Página 26
... centre being the youngest . I have not suc- ceeded in obtaining any section which will show this structure . It has been imagined that this glandular Pleurenchyma is confined to Gymnosperms , but Dr. Brown long since remarked it in ...
... centre being the youngest . I have not suc- ceeded in obtaining any section which will show this structure . It has been imagined that this glandular Pleurenchyma is confined to Gymnosperms , but Dr. Brown long since remarked it in ...
Página 28
... centre of spiral vessels , and then it is manifest that the fibre is internal , because it projects beyond the inside of the vessel , at every turn . It is more difficult to determine whether the fibre is solid , or tubular , or flat ...
... centre of spiral vessels , and then it is manifest that the fibre is internal , because it projects beyond the inside of the vessel , at every turn . It is more difficult to determine whether the fibre is solid , or tubular , or flat ...
Página 42
... centre of cells . The same circumstance is particularly visible in the oval cells found in the leaves of Caladium esculentum , Dieffen- bachia Seguina , and some other Araceæ . Here the acicular raphides are not only collected in ...
... centre of cells . The same circumstance is particularly visible in the oval cells found in the leaves of Caladium esculentum , Dieffen- bachia Seguina , and some other Araceæ . Here the acicular raphides are not only collected in ...
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Palavras e frases frequentes
Adolphe Brongniart anther apex appears arranged axis bark base become bladders body botanists bracts branches buds bundles called calyx Candolle carbonic acid carpels cause cavity cells cellular tissue centre character colour colourless common compound considered consists corolla cotyledons cyclosis cyme dehiscence developement direction disk dissepiments distinct Dutrochet elongated embryo Endogens epidermis exist Exogens external extremity fibres fleshy flowers fluid fruit glands grains granules green growing hairs inflorescence integument kind layers leaf leaflets leaves Linnæus lobes margin matter medullary rays membrane midrib Mirbel modifications Mohl monocotyledons nature nucleus observations organs ovary ovule oxygen parenchyma peculiar pericarp petals petiole pistil pith placenta plants Plate pollen pollen tube produced quantity radicle remarkable roots round seeds separate side sometimes species spiral vessels stamens stem stigma stomates structure substance surface term terminal tion tree tube valves vascular vegetable veins wood woody tissue yellow