Physiological Botany: An Abridgement of The Students' Guide to Structural, Morphological, and Physiological BotanyD. Appleton and Company, 1886 - 292 páginas |
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Página 40
... entirely of parenchyma , but , at the end of the first year's growth , we find : 1 , A central mass of parenchyma , m , which is called the Medulla or Pith ; 2 , An interrupted ring of spiral vessels , t , called the Medullary sheath ...
... entirely of parenchyma , but , at the end of the first year's growth , we find : 1 , A central mass of parenchyma , m , which is called the Medulla or Pith ; 2 , An interrupted ring of spiral vessels , t , called the Medullary sheath ...
Página 42
... entirely of woody tissue and pitted vessels , c , b . In the third year of growth another ring of wood is produced precisely resembling the second ( Fig . 91 , 3 ) , and the same is the case with each succeeding an- nual ring as long as ...
... entirely of woody tissue and pitted vessels , c , b . In the third year of growth another ring of wood is produced precisely resembling the second ( Fig . 91 , 3 ) , and the same is the case with each succeeding an- nual ring as long as ...
Página 45
... entirely composed , like the pith , of parenchyma , but , as soon as the wood begins to be devel- oped on the outside of the pith , certain cells which lie nearer the surface of the stem make their appearance , which develop into liber ...
... entirely composed , like the pith , of parenchyma , but , as soon as the wood begins to be devel- oped on the outside of the pith , certain cells which lie nearer the surface of the stem make their appearance , which develop into liber ...
Página 62
... entirely of parenchymatous cells ( Fig . 109 , a ) ; wood - cells and vessels , however , soon make their appearance , and are constantly added to below by the new tissue formed as the root continues to lengthen . When the root is fully ...
... entirely of parenchymatous cells ( Fig . 109 , a ) ; wood - cells and vessels , however , soon make their appearance , and are constantly added to below by the new tissue formed as the root continues to lengthen . When the root is fully ...
Página 65
... entirely from the air in which they are developed ; hence the name of air - plants which is applied to them . They are also called epiphytes , because they usually grow upon other plants . The roots of such plants are commonly green ...
... entirely from the air in which they are developed ; hence the name of air - plants which is applied to them . They are also called epiphytes , because they usually grow upon other plants . The roots of such plants are commonly green ...
Otras ediciones - Ver todas
The Student's Guide to Structural, Morphological and Physiological Botany Robert Bentley Sin vista previa disponible - 2016 |
The Student's Guide to Structural, Morphological and Physiological Botany Robert Bentley Sin vista previa disponible - 2016 |
Términos y frases comunes
absorption æstivation albumen anther antheridia antherozoids apex appearance archegonia arranged axil bark base becomes bracts branches buds called calyx carbon dioxide carpels cavity cell-wall cells Fig cellular chalaza chlorophyl coat color commonly compound consists contain corolla cotyledons cyme dehiscence described developed Dicotyledonous dissepiments elongated embryo embryo-sac epidermis external fertilization fibro-vascular bundles filaments fleshy floral flower-buds flowers fluid frequently fruit glands granules green grow growth hairs hence hilum inclosed indehiscent inflorescence inner kind layer leaf leaves less lobes matters medullary membrane micropyle Monocotyledonous nature nucleus occur organs outer ovary ovule oxygen parenchyma pericarp petals petiole pistil pith pitted placenta plants pollen pollen-cells portion primary axis produced protoplasm radicle reproductive roots seeds sepals species spiral vessels sporangium spores stalk stamens starch stem stigma stomata structure style substance surface sutures takes place termed terminal thalamus Thallophytes thickened tion tissue transverse usually valves vary walls whorls wood wood-cells
Pasajes populares
Página ii - Society, etc.; and JB HOLDER, MD, Curator of Zoology of American Museum of Natural History, Central Park, New York. 12mo, 385 pages. A COMPEND OF GEOLOGY. By JOSEPH LE CONTE, Professor of Geology and Natural History in the University of California; author of "Elements of Geology,
Página 223 - ... bundles ; or the increased size of the coming leaf-bud will snap them ; or if these causes are not in operation, a gust of wind, a heavy shower, or even the simple weight of the lamina, will be enough to disrupt the small connexions, and send the suicidal member to its grave. " Such is the history of the fall of the leaf.
Página vi - Descriptive Botany," by Eliza A. Youmans. Designed to give an elementary account of Structural and Physiological Botany, or of the inner and minute mechanism and activities of plants. It treats of what the parts of a plant are built up, and what functions they perform In its history as a living being.