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
Diagnostic
Value
h high me medium mo modest
Ring porous:
The diameter of the pores in the earlywood is much greater than the
diameter of the pores in the latewood.
q
h
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
Diffuse porous:
The pores of the earlywood and latewood are approximately the same
size.
q
h
Solitary pores:
Pores which in general are not in contact with other pores.
q
me
Radial pore files:
Several pores joined in radial groups, the number of pores in a group
varying according to the species.
q
h
Pore cluster:
Three or more pores irregularly grouped.
