An Introduction to BotanyLongman, Orme, Brown, Green, and Longmans, 1839 - 594 páginas |
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Página vi
... botanists , upon some points connected with this subject , so that it has been found expedient to enter occasionally into much detail , for the purpose of satisfying the student of the accuracy of the facts and reasonings upon which he ...
... botanists , upon some points connected with this subject , so that it has been found expedient to enter occasionally into much detail , for the purpose of satisfying the student of the accuracy of the facts and reasonings upon which he ...
Página 5
... botanists , who have described the existence of holes or pores in the membrane of tissue , and have even thought they saw a distinct rim to them ; but this idea , which originated in imperfect observation with illcon- structed glasses ...
... botanists , who have described the existence of holes or pores in the membrane of tissue , and have even thought they saw a distinct rim to them ; but this idea , which originated in imperfect observation with illcon- structed glasses ...
Página 49
... Botanists were formerly not agreed upon the exact nature of the epidermis ; while some inclined to the opinion that it is an external layer of cellular tissue in a compressed state , others , among whom were included both Kieser and ...
... Botanists were formerly not agreed upon the exact nature of the epidermis ; while some inclined to the opinion that it is an external layer of cellular tissue in a compressed state , others , among whom were included both Kieser and ...
Página 66
... botanists call papulæ , or papillæ ( fig . 16. e and n . ) Glandulæ utriculares of Guettard ; these are transparent elevated points of the epidermis , filled with fluid , and covering closely the whole surface upon which they appear ...
... botanists call papulæ , or papillæ ( fig . 16. e and n . ) Glandulæ utriculares of Guettard ; these are transparent elevated points of the epidermis , filled with fluid , and covering closely the whole surface upon which they appear ...
Página 71
... is occasionally found convenient to designate particular kinds of branches by special names . Thus , the twigs , or youngest shoots , are called ramuli , or branchlets , and by the older botanists flagella ; the F 4 CHAP . II . 71 STEM .
... is occasionally found convenient to designate particular kinds of branches by special names . Thus , the twigs , or youngest shoots , are called ramuli , or branchlets , and by the older botanists flagella ; the F 4 CHAP . II . 71 STEM .
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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.