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Morphology

H, succulent plant, 10-40 cm

Ecology

Alpine and subalpine, medium site

Chorology

Arctic-Alpine

Xylem

Distinct rings but only visible in polarized light, semi-ring porous, vessels solitary and in groups, often vesselless zone (intervascular parenchyma). Vessel diameter 20 ¿ 50µm, vessel frequency 100-200 mm2, vessel frequency 200-500 mm2, reticulate vessel-pitting, fibers missing, rays in form of pith-outcrop parenchyma, crystals absent.

Xylem-Code

See annex

Phloem

Distinct sieve cell groups in radial rows, crystals absent.

Explanations

For explanations please see the Feature Characteristics.

© 2005 WSL - F. Schweingruber, W. Landolt, last update 18.11.2010

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