Distinct rings, semi-ring porous, vessels in diagonal patterns, simple perforations, fine spiral thickenings, earlywood vessel diameter 30 - 50µm, fibers mostly thick-walled, with few fiber tracheids, parenchyma absent or not to recognize, ray width 4-10 cell, all ray cells prostrate, ray height >1mm, crystals absent.
Tangential layers of collapsed sieve cells, few groups of sclerenchymatic cells in rays, annual? tangential cracks, crystals absent
For explanations please see the Feature Characteristics Volume 1.
© 2005 WSL - F. Schweingruber, W. Landolt, last update 18.11.2010