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Vessel groupings: A. Vessels exclusively solitary, e.g. Aspidosperma album. B. Vessels solitary and in short radial multiples (of mostly 2 or 3 cells), e.g. Qualea rosea. C. Vessels solitary, in radial multiples of 2-5(-7) and small clusters, e.g. Ormosia coccinea. D. Vessels solitary, and in short and long radial multiples (of 2 or more cells). Vessel arrangement: D. Vessels in radial pattern, e.g. Manilkara bidentata. E. Vessels in diagonal pattern, e.g. Sextonia rubra. F. Vessels in tangential bands indicating a growth zone.
Figure 22. Vessel elements and tyloses A-C. Perforation plates (pe) of vessel elements. (A, B) simple, (C) scalariform with 6 bars (b) D. Tyloses (t): outgrowths from adjacent ray cells into the vessel.
timber trees of suriname
Figure 21. Vessel groupings and arrangement in cross section of wood