C 5-20 cm
subalpine and alpine
Distinct rings, diffuse-porous, vessels in radial to slightly diagonal groups, simple perforations, partially with helical thickenings, ray-vessel pits large, round, vessels surrounded by vasicentric tracheids, fibers thin-walled, with small pits, parenchyma apotracheal, in aggregates and terminal, rays uniseriate, heterocellular with 2-4 square and upright cells.
With many fibers in groups, fibers unlignified and do not show up in polarized light, phellem cells in regular radial rows, with slime ducts.
For explanations please see the Feature Characteristics.
© 2005 WSL - F. Schweingruber, W. Landolt, last update 18.11.2010