An Introduction to BotanyLongman, Orme, Brown, Green, and Longmans, 1839 - 594 páginas |
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Página 2
... whole exterior surface of all plants , and that it is even drawn over the sacs which constitute hairs ; I have found it distinctly on the petals of Hydrotænia meleagris ( see Bot . Reg . 1838. misc . No. 128. ) , but its extreme tenuity ...
... whole exterior surface of all plants , and that it is even drawn over the sacs which constitute hairs ; I have found it distinctly on the petals of Hydrotænia meleagris ( see Bot . Reg . 1838. misc . No. 128. ) , but its extreme tenuity ...
Página 13
... whole of Mosses , Algæ and Lichens ; it forms all the pulpy parts , the parenchyma of leaves , the pith , medullary rays , and principal part of the bark in the stem of Exogens , the soft substance of the stem of Endogens , the delicate ...
... whole of Mosses , Algæ and Lichens ; it forms all the pulpy parts , the parenchyma of leaves , the pith , medullary rays , and principal part of the bark in the stem of Exogens , the soft substance of the stem of Endogens , the delicate ...
Página 18
... hooked , so that the whole has some resemblance to the teeth of a currycomb , in the anthers of Campanula ; first noticed by Purkinje . ( Plate I. fig . 18. ) 5. Fibres forming distinct arches , as seen in the 18 BOOK I. ORGANOGRAPHY .
... hooked , so that the whole has some resemblance to the teeth of a currycomb , in the anthers of Campanula ; first noticed by Purkinje . ( Plate I. fig . 18. ) 5. Fibres forming distinct arches , as seen in the 18 BOOK I. ORGANOGRAPHY .
Página 57
... whole existence . Some physiologists , Link for instance , adhere to the opi- nion that stomates are glands or secreting organs , and not mere passages in the cuticle for the transmission of gaseous matter . Upon this subject I quote ...
... whole existence . Some physiologists , Link for instance , adhere to the opi- nion that stomates are glands or secreting organs , and not mere passages in the cuticle for the transmission of gaseous matter . Upon this subject I quote ...
Página 60
... partitions . They are sometimes branched into two or three forks at the extremity , as in Alyssum , some species of Apargia , & c . Occasionally they emit little branches along their whole length : when such 60 BOOK I. ORGANOGRAPHY .
... partitions . They are sometimes branched into two or three forks at the extremity , as in Alyssum , some species of Apargia , & c . Occasionally they emit little branches along their whole length : when such 60 BOOK I. ORGANOGRAPHY .
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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