Microscopic characteristics of dicotyledonous wood

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Rays in tangential section



t tangential
q transversal


me medium
mo modest

  Homogeneous rays:
All cells are round or oval in form.
t h
Heterogeneous rays:
The margin cells are of another form than the internal, prostrate cells.
t h

Uniseriate rays:
Are only one cell wide.

picture 1: homogeneous
picture 2: heterogeneous

t h

Biseriate to triseriate rays:
Most of the rays are 2-3 cells wide, however rare uniseriate and 4-seriate rays are present.

picture 1,2: homogeneous
picture 3: heterogeneous

t h

Triseriate to 5-seriate rays:
Most of the rays are 3-5 cells wide, however rare uniseriate and biseriate rays are present.

picture 1: homogeneous
picture 2,3: heterogeneous

  Storied rays:
Rays are distributed in series at regular intervals.
t me  
  Uniseriate and multiseriate rays:
In addition to numerous uniseriate rays, large rays which are visible to the naked eye are also present.
t h
  Aggregate rays:
Group of narrow rays which to the naked eye appears as a multiseriate ray.
t/q h
  Sheath cells:
A series of upright cells bordering multiseriate rays: In tangential section forming a sheath around the inner, prostrate cells.
t me
  Ray cells enlarged at the growth ring boundary. q h

  © / authors / citation / 12.05.04


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