| |
 |
|
|
| |
Pinus nigra Arnold
|
Austrian Pine, Black Pine
|
Pinaceae
|
| |
 |
| |
Transversal section |
|
|
| |
Growth ring boundaries always distinct. Transition from early- to latewood generally abrupt. Large resin canals with thin-walled epithelial cells. Considerable fluctuation in wood density and occasionally false growth rings are observed in samples from lowland regions. |
 
|
| |
| |
Radial section |
|
|
| |
Tracheid pits almost uniseriate. Rays heterocellular. Ray tracheids with dentated walls. Cross-fields from parenchyma cells to tracheids with one (rarely two) large fenestriform pits. |
   
|
| |
| |
Tangential section |
|
|
| |
Average height of rays 8 to 15 cells. Resin canals in rays with thin-walled epithelial cells. |
   
|
| |
| |
Key characters |
|
|
| |
Resin canals with thin-walled epithelial cells. Rays with large fenestriform pits, ray tracheids with distinctly dentate walls. |
| |
| |
Remarks |
|
|
| |
The species P. nigra, P. mugo and P. silvestris cannot be distinguished on the basis of their wood anatomy. |
| |
