An Introduction to Botany |
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Page 3
... doubt that it is also , at least sometimes , solid , as in the fibrous cellules of the leaf of Oncidium altissimum ; it is the opinion of many that it is hollow in the case of spiral vessels . Fibre has a constant tendency to ...
... doubt that it is also , at least sometimes , solid , as in the fibrous cellules of the leaf of Oncidium altissimum ; it is the opinion of many that it is hollow in the case of spiral vessels . Fibre has a constant tendency to ...
Page 14
... doubt true that , in general , there is no trace of such septa ; but I think it is impossible to deny their existence in the tissue of the Lime tree , at least . There are three distinct kinds of woody fibre : - 1. That in which the ...
... doubt true that , in general , there is no trace of such septa ; but I think it is impossible to deny their existence in the tissue of the Lime tree , at least . There are three distinct kinds of woody fibre : - 1. That in which the ...
Page 18
... doubts upon these points arise from the extreme minuteness of the vessels , and from the different degrees of skill that observers employ in the use of the microscope , I can scarcely hope that any ob- servations of mine will have much ...
... doubts upon these points arise from the extreme minuteness of the vessels , and from the different degrees of skill that observers employ in the use of the microscope , I can scarcely hope that any ob- servations of mine will have much ...
Page 19
... doubt given rise to the idea that it is a strap or riband , with the edges either thickened , according to M. De Candolle , or rolled inwards according to Mirbel . But it is also the property of a trans- parent cylinder to exhibit this ...
... doubt given rise to the idea that it is a strap or riband , with the edges either thickened , according to M. De Candolle , or rolled inwards according to Mirbel . But it is also the property of a trans- parent cylinder to exhibit this ...
Page 20
... doubt that the fibres are really solid . The nature of the termination of spiral vessels is now placed beyond all doubt , by the preparations of Mr. Valentine , above alluded to , and by some observations of my own . It is stated by ...
... doubt that the fibres are really solid . The nature of the termination of spiral vessels is now placed beyond all doubt , by the preparations of Mr. Valentine , above alluded to , and by some observations of my own . It is stated by ...
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Common terms and phrases
acid Adolphe Brongniart albumen anther apex appearance appendages arrangement axis bark base become body botanists bractea branches Brown buds called calyx Cand Candolle carpella cavity cells cellular tissue cellules centre chalaza characters Class colour common Compositæ compound considered consists corolla cotyledons cuticle dehiscence developed dicotyledons direction disk dissepiments distinct distinguished ducts earth elongated embryo exist extremely filament fleshy flowers fluid fructification fruit genera genus granules hairs hilum indehiscent inflorescence integuments kind latter leaf leaflets leaves Linnæus lobes margin medullary rays membrane Mirb Mirbel modifications monocotyledons nature observed organs ovarium ovula ovulum oxygen parenchyma peculiar pericarpium petals petiole pistillum pith placenta plants Plate plumula pollen produced racters radicle receptacle remarkable roots seed sepals separate side sometimes species spiral vessels sporules stamens stem stigma stomata structure substance surface term terminating testa tree tube valves vascular vegetation veins wood woody fibre
Popular passages
Page 6 - Thysanotus fasciçularii, the flowers of which are of a deep brilliant violet, with a remarkably satiny lustre, that appearance will be found to arise from each particular cell containing a single drop of...
Page 217 - ... in its substance, and of evaporating pores on its surface, enables the crude fluid sent from the roots to be elaborated and digested until it becomes the peculiar secretion of the species; the contraction of a branch and its leaves forms a flower ; the disintegration of the internal tissue of a petal forms an anther; the folding inwards of a leaf is sufficient to constitute a...
Page 525 - ... verging to green. Again, the ranunculus, which is originally of an intense yellow, sports into scarlet, red, purple, and almost any colour but blue. White flowers, which have a tendency to produce red, will never sport to blue, although they will to yellow ; the rose, for example, and chrysanthemums. It is also probable that white flowers with a tendency to produce blue, will not vary to yellow.