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Vessels (Pores)
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Vessel=Trachea:
A tube-like series of water-conducting cells (with bordered pits)
which are axially joined by perforation plates in the cell end walls.
The vessels in cross-sections are called pores. |
Section
r radial
t tangential
q transversal
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Diagnostic
Value
h high
me medium
mo modest
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Ring porous:
The diameter of the pores in the earlywood is much greater than the
diameter of the pores in the latewood. |
q |
h |
 |
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Semi-ring porous:
The pores in the earlywood are more numerous and distinctly larger
than those in the latewood. The semi-ring porous state may be induced
by water-deficiency; thus this anatomic characteristic is of little
value for diagnostic purposes. |
q |
me |
 |
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Diffuse porous:
The pores of the earlywood and latewood are approximately the same
size. |
q |
h |
 |
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Solitary pores:
Pores which in general are not in contact with other pores. |
q |
me |
 |
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Radial pore files:
Several pores joined in radial groups, the number of pores in a group
varying according to the species. |
q |
h |
 |
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Pore cluster:
Three or more pores irregularly grouped. |
q |
me |
 |
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Flame-like, radial distribution of pores. |
q |
h |
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Radial orientation of pores. |
q |
h |
 |
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Oblique orientation of pores. |
q |
h |
 |
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Tangential orientation of pores. |
q |
h |
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