The Oak a Popular Introduction to Forest Botany
The Oak a Popular Introduction to Forest Botany
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In our eReader you can find the full English version of the book. Read The Oak a Popular Introduction to Forest Botany Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Oak a Popular Introduction to Forest Botany
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(Hartig. ) less phloem than xylem is formed ; (2) that the ele- ments do not become lignified ; and (3) that the dis- turbances in the arrangement of the elements are more profound from the continued pressure exerted upon them between the resistant wood and the elastic peri- derm and bark, on the one hand, and the increased ex- tension tangentially which it undergoes as the thicken- 112 THE OAK.
ing mass of wood drives it outwards, on the other. The other differences chiefly concern the individ...ual elements now to be described.
All that was said of the medullary rays in the wood applies also to those in the bast ; the cambium in keep- ing open or originating new medullary rays does so on both sides, and therefore the medullary rays are to be traced radially through the cambium from wood to cor- tex. The rays in the bast are termed " bast rays " ; the broader ones contain isolated groups of sclerotic cells and cells containing crystals.
The changes which the radial rows of cells on the exterior of the cambium zone undergo to form the ele- ments of the secondary phloem are as follows : (1) Bast parenchyma (Fig.
What to read after The Oak a Popular Introduction to Forest Botany?
You can find similar books in the "Read Also" column, or choose other free books by H Marshall Harry Marshall Ward to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
(Hartig. ) less phloem than xylem is formed ; (2) that the ele- ments do not become lignified ; and (3) that the dis- turbances in the arrangement of the elements are more profound from the continued pressure exerted upon them between the resistant wood and the elastic peri- derm and bark, on the one hand, and the increased ex- tension tangentially which it undergoes as the thicken- 112 THE OAK.
ing mass of wood drives it outwards, on the other. The other differences chiefly concern the individ...ual elements now to be described.
All that was said of the medullary rays in the wood applies also to those in the bast ; the cambium in keep- ing open or originating new medullary rays does so on both sides, and therefore the medullary rays are to be traced radially through the cambium from wood to cor- tex. The rays in the bast are termed " bast rays " ; the broader ones contain isolated groups of sclerotic cells and cells containing crystals.
The changes which the radial rows of cells on the exterior of the cambium zone undergo to form the ele- ments of the secondary phloem are as follows : (1) Bast parenchyma (Fig.
What to read after The Oak a Popular Introduction to Forest Botany?
You can find similar books in the "Read Also" column, or choose other free books by H Marshall Harry Marshall Ward to read onlineMoreLess
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