An Introduction to BotanyLongman, Orme, Brown, Green, and Longmans, 1839 - 594 páginas |
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Página 13
... kind that exists . This sort of tissue is to be considered the basis of vegetable structure , and the only form indispen- sable to a plant . Many plants consist of nothing else ; and in no case is it ever absent . It constitutes the ...
... kind that exists . This sort of tissue is to be considered the basis of vegetable structure , and the only form indispen- sable to a plant . Many plants consist of nothing else ; and in no case is it ever absent . It constitutes the ...
Página 15
... kind has been recognised . The first observation with which I am acquainted is that of Mol- denhauer , who , in 1779 , described the leaves of Sphagnum as marked by fibres twisted spirally . ( Fig . 3. a , p . 9. ) In November , 1827 ...
... kind has been recognised . The first observation with which I am acquainted is that of Mol- denhauer , who , in 1779 , described the leaves of Sphagnum as marked by fibres twisted spirally . ( Fig . 3. a , p . 9. ) In November , 1827 ...
Página 16
John Lindley. Instead of being very rare , cellular tissue of this kind appears to be found in various parts ; it has been already mentioned as existing in the leaves of Sphagnum ; it is also found in the pith of Rubus odoratus . I ...
John Lindley. Instead of being very rare , cellular tissue of this kind appears to be found in various parts ; it has been already mentioned as existing in the leaves of Sphagnum ; it is also found in the pith of Rubus odoratus . I ...
Página 25
... kind of woody tissue is the glandular . This has hitherto been examined chiefly in Coniferæ , in which it uniformly occurs . Its dimensions are more considerable than that of the last - mentioned form , and it has been described as ...
... kind of woody tissue is the glandular . This has hitherto been examined chiefly in Coniferæ , in which it uniformly occurs . Its dimensions are more considerable than that of the last - mentioned form , and it has been described as ...
Página 27
... kind of tissue , upon the exact nature of which anatomists are , however , much divided in opinion ; some be- lieving that the fibre coheres independently of any membrane , others doubting or denying the mode in which the vessels ...
... kind of tissue , upon the exact nature of which anatomists are , however , much divided in opinion ; some be- lieving that the fibre coheres independently of any membrane , others doubting or denying the mode in which the vessels ...
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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 colour common considered consists containing corolla cotyledons cyclosis developement dicotyledons direction disk distinct Dutrochet elongated embryo epidermis exist external 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 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 sometimes species specimens spiral vessels stamens stem stigma stomates structure substance surface term terminating tion tree tubes vascular vegetable veins wood woody tissue yellow
Passagens conhecidas
Página 593 - Dr. Ure's Dictionary of Arts, Manufactures, and Mines : Containing a clear Exposition of their Principles and Practice.