An Introduction to BotanyLongman, 1839 - 594 páginas |
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Página 8
... thing except their form ; their sides were uniform , thin , colourless , and transparent ; but they soon began to thicken , to lose their transparency , and to be marked all round from end to end with two contiguous parallel streaks ...
... thing except their form ; their sides were uniform , thin , colourless , and transparent ; but they soon began to thicken , to lose their transparency , and to be marked all round from end to end with two contiguous parallel streaks ...
Página 11
... thing occurs in the case of Marchantia polymorpha . That learned botanist , in the course of his inquiries into the structure of this plant , found that in all cases one tube or utricle generated another externally , so that sometimes ...
... thing occurs in the case of Marchantia polymorpha . That learned botanist , in the course of his inquiries into the structure of this plant , found that in all cases one tube or utricle generated another externally , so that sometimes ...
Página 23
... thing prepared from flax , hemp , and the like , is composed of woody tissue ; but cotton , which is cellular tissue , bears no comparison as to strength , with either flax or hemp . Alphonse De Candolle gives the following as the ...
... thing prepared from flax , hemp , and the like , is composed of woody tissue ; but cotton , which is cellular tissue , bears no comparison as to strength , with either flax or hemp . Alphonse De Candolle gives the following as the ...
Página 34
... thing , but with the envelop- ing membrane growing more rapidly than the enclosed fibre , which is consequently broken into pieces that contract into rings . Reticulated ducts may in like manner be considered as spiral vessels , whose ...
... thing , but with the envelop- ing membrane growing more rapidly than the enclosed fibre , which is consequently broken into pieces that contract into rings . Reticulated ducts may in like manner be considered as spiral vessels , whose ...
Página 49
... thing formed by the adhesion of cellular tissue ; that when it is once removed , the subjacent tissue dies , and does not become epidermis in its turn , and that it may often be torn up readily without laceration . On the other hand ...
... thing formed by the adhesion of cellular tissue ; that when it is once removed , the subjacent tissue dies , and does not become epidermis in its turn , and that it may often be torn up readily without laceration . On the other hand ...
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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