An Introduction to BotanyLongman, Orme, Brown, Green, and Longmans, 1839 - 594 páginas |
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Resultados 1-5 de 65
Página 7
... experiments of Schleiden . Of the organic mucus , membrane , and elementary fibre thus described , all the elementary organs of plants are con- structed . For the convenience of description , they may be considered as of five different ...
... experiments of Schleiden . Of the organic mucus , membrane , and elementary fibre thus described , all the elementary organs of plants are con- structed . For the convenience of description , they may be considered as of five different ...
Página 124
... experiments were instituted : - Five bulbs were sown upon powdered sandstone , and it was found that the face which touched the sandstone produced roots , and the opposite face formed stomates . It was , how- ever , possible that the ...
... experiments were instituted : - Five bulbs were sown upon powdered sandstone , and it was found that the face which touched the sandstone produced roots , and the opposite face formed stomates . It was , how- ever , possible that the ...
Página 180
... experiment , whether or not the pollen of one of these com- partments only possesses the external characters of pollen , and likewise different functions in the process of impregna- tion , or whether in dioecious plants one kind would ...
... experiment , whether or not the pollen of one of these com- partments only possesses the external characters of pollen , and likewise different functions in the process of impregna- tion , or whether in dioecious plants one kind would ...
Página 265
... experiments of Savi of Pisa . This observer introduced into different vessels , 1. the granules ; 2. the grains ; and , 3. , the two intermixed . In the first two nothing germinated ; in the third the grains floated to the surface and ...
... experiments of Savi of Pisa . This observer introduced into different vessels , 1. the granules ; 2. the grains ; and , 3. , the two intermixed . In the first two nothing germinated ; in the third the grains floated to the surface and ...
Página 289
... experiments , made independently of each other , and in entirely different ways , both lead to the conclu- sion that the original tissue of plants is in all cases of the same chemical constitution , or nearly so , but that the sedi ...
... experiments , made independently of each other , and in entirely different ways , both lead to the conclu- sion that the original tissue of plants is in all cases of the same chemical constitution , or nearly so , but that the sedi ...
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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