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Morphology

N , 100-300cm

Ecology

mountain and subalpine volcanic ash

Chorology

Macaronesia

Xylem

Distinct rings, semi-ring-porous, vessels grouped in dendritic patterns, simple perforations, with helical thickenings, fiber pits vestured, vessel diameter >40-50µm, fibers thick-walled, parenchyma vasicentric, ray width 1-3 cells, homocellular, procument cells, crystals mostly absent, parenchyma storied, with a very few crystals druses.

Xylem-Code

See annex

Phloem

Without sieve tube groups, tangential layers of collapsed sclerenchyma, tangential rows of sclerenchymatic groups, 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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