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Sempervivum arachnoideum L. Photographs missing

Crassulaceae

Morphology

H, succulent plant, 6-10 cm

Ecology

Hill and mountain zone, dry site

Chorology

SW-European, mountain

Xylem

Distinct rings in polarized light, semi-ring porous, vessels solitaryand in groups, Vessel diameter <20mµ, vessel frequency 200-500 mm2, reticulate vessel-pitting, fibers missing, pervasive parenchyma, rayless, crystals absent.

Xylem-Code

See annex

Phloem

Distinct sieve cell groups parenchyma in radial rows, crystals absent.

Explanations

For explanations please see the Feature Characteristics Volume 1.

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

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