. Introduction to structural and systematic botany, and vegetable physiology. Botany. VESSELS OF THE LATEX. 49. 63. laticiferous Tissue. {Vessels of the Latex or Milky Juice. \ Oinenchyma of Morren and Lindley.) This consists of long and irregular branching tubes or passages, lying in no definite position with respect to other tissue, and when young of such extreme tenu- ity (their average diameter being less than the fourteen-hundredth of an inch) and of such trans- parency that they are hardly visible, even under powerful mi- croscopes, except by particular manipulation. But their older trun
. Introduction to structural and systematic botany, and vegetable physiology. Botany. VESSELS OF THE LATEX. 49. 63. laticiferous Tissue. {Vessels of the Latex or Milky Juice. \ Oinenchyma of Morren and Lindley.) This consists of long and irregular branching tubes or passages, lying in no definite position with respect to other tissue, and when young of such extreme tenu- ity (their average diameter being less than the fourteen-hundredth of an inch) and of such trans- parency that they are hardly visible, even under powerful mi- croscopes, except by particular manipulation. But their older trunks are larger and more evi- dent, when gorged with the milky or other special juices which it is their office to contain, and when their sides are thickened by the deposition of such matters. Another peculiarity is, that they anastomose or inosculate, forming a sort of network by the union of their branches, so that they freely communicate with each other. In this respect, as well probably as in the mode of their formation, they resemble the veins of But their branches do not proceed from larger trunks, and in turn, divide into smaller branchlets. They merely fork and inosculate' here and there, the branches being commonly as large as the trunk before division. Tlie articulations which they often present (as in the upper part of Fig. 67) would seem to prove that they are formed by the confluence of cylindrical cells. It is altogether most probable, however, that they are not composed of cells at all; but are, at first,, mere passages in the intercellular spaces, which in time are bounded by walls formed by deposition from the contained fiuid. Schultz, who discovered these peculiar vessels and gave to them their present name, describes a regular circulation of the juice they contain; which would make them still more analogous to the vessels or veins of animals. But this has been shown to have no real! existence. There is merely a mechanical flow from any part under pre
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Keywords: ., bookauthorgra, bookcentury1800, bookdecade1850, booksubjectbotany
