. A manual of botany. Botany. TISSUE SYSTEMS ;ir,;j meiismatic powers. This constitutes the cambium of the bundle (fig. 738, c). Its cells are usually elongated parenchyma with thin walls and granular protoplasm. By this merismatic layer the bast on the one side and the wood on the other are increased, so that the conjoint bundle grows both inwards and outwards. This cambium is a primary meristem. Fir4. Fiij. 739. Collateral bundle from stem of a Monocotylerloii. ph. Phloem. X, Xylem vessels, ^.j;. Protoxylem. Protophloem. Ihe bundle is surrounded by a small celled s
. A manual of botany. Botany. TISSUE SYSTEMS ;ir,;j meiismatic powers. This constitutes the cambium of the bundle (fig. 738, c). Its cells are usually elongated parenchyma with thin walls and granular protoplasm. By this merismatic layer the bast on the one side and the wood on the other are increased, so that the conjoint bundle grows both inwards and outwards. This cambium is a primary meristem. Fir4. Fiij. 739. Collateral bundle from stem of a Monocotylerloii. ph. Phloem. X, Xylem vessels, ^.j;. Protoxylem. Protophloem. Ihe bundle is surrounded by a small celled sheath of sclerenchyma. After Kny. The collateral bundle of the second type is similarly de- veloped from the procambium strand. The protoxylem is an annular or spiral vessel of some size, occupying a position in the front of the bundle. Frequently it abuts on a lysigenous intercellular space, as seen in fig. The protophloem, again, VOL. I. A A. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Green, J. Reynolds (Joseph Reynolds), 1848-1914. London, J. & A. Churchill
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