Mountain and subalpine, wet site
No secondary growth but sometimes with an intervascular cambium, single vascular bundles around the star-like pith, , rings absent, vessels in groups, vessel diameter 20-30mµ, vessels thick-walled (3mµ), fibers absent, simple perforations, round and scalariform bordered intervascular pits, pervasive parenchyma, vascular bundles rayless, very large rays (extrusions from the pith) between the bundles.
Groups of sieve elements in a thin walled parenchymatic tissue.
For explanations please see the Feature Characteristics.
© 2005 WSL - F. Schweingruber, W. Landolt, last update 18.11.2010