Microscopic characteristics of dicotyledonous wood
more microscopic characteristics ...
Coniferous wood
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Resin canals
Pitting in rays
Structure of tracheid walls an xylem rays
Dicotyledonous wood
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Vessels (Pores)
Sizes of pores, density of pores
Vessels and fibers in longitudinal section
Rays in tangential section
Rays in radial section
Parenchyma
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Sizes of pores, Density of pores
Uniform distribution of pores.
Section
r
radial
t
tangential
q
transversal
Diagnostic
Value
h
high
me
medium
mo
modest
Large pores
(radial diameter of one pore 70-180 µm)
sparsely distributed (15-25 pores/mm2).
q
h
Medium-sized pores
(radial diameter of one pore: 50-100 µm).
q
me
Small pores
(radial diameter of one pore: 30-80 µm).
q
me
Very small pores
(radial diameter of one pore: 20-30 µm).
q
h
Tyloses:
An outgrowth of an adjacent parenchyma cell through the pit cavity in a vessel wall. The vessel lumen may be obstructed.
Gum deposits.
q/r
me
Tyloses with thin walls.
q/r
h
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citation
/ 04.02.04
