The Encyclopaedia Britannica; .. A dictionary of arts, sciences and general literature . are similar. In fig. 76 isrepresented the bark of DaphneLaureola,—-/ indicating the woodyfibres of Hber, and r the medullaryrays. The endophlceum increases bylayers on its inside, which are thiand may be separated like the leaves i;,- of a book. The outer layer of bast-fibrea betwixt the endophlceum and theouter bark has been termed the corticalsheath, corresponding to the medullarysheath on the inside of the stem. The outer bark is formed from the primary cortex; it iaalways ceDular, and is divided into t
The Encyclopaedia Britannica; .. A dictionary of arts, sciences and general literature . are similar. In fig. 76 isrepresented the bark of DaphneLaureola,—-/ indicating the woodyfibres of Hber, and r the medullaryrays. The endophlceum increases bylayers on its inside, which are thiand may be separated like the leaves i;,- of a book. The outer layer of bast-fibrea betwixt the endophlceum and theouter bark has been termed the corticalsheath, corresponding to the medullarysheath on the inside of the stem. The outer bark is formed from the primary cortex; it iaalways ceDular, and is divided into two layers, the ^i-. Fig. 76. Network formed by liber CIDaphnt Laweola, /, f,fibrous bundles ; r, r,medullary rays. 102 BOTANY [kUTEITIVB OBCViMS phloeum with the mesophlosum underneath. The cellularenvelope, or mesophlceum, lies immediately on the outside ofthe liber; It consists of polyhedral, often prismatical cells,elongated vertically to the surface, usually havingchlorophyll,or green colouring matter, in their interior, but sometimesbeing colourless, and containing raphides. They are dis-linguished from those of the epiphloeum by their form anddirection, by their thicker walls, their green colour, and theintorcallular spaces which occur among them. This cover-ing is usually less developed than the outer suberous layer,but sometimes, as in the Larch and common Fir, it be-comes very thick, and separates like the epiphloeum. Inthe cellular envelope laticiferous vessels occur. The epi-phloeum is the outer covering of the bark, consisting ofcells which usually assume a cubical or flattened tabularform. T
Size: 1244px × 2009px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectencyclo, bookyear1902
