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Morphology

H, 40 -100cm

Ecology

arid

Chorology

W-North America

Xylem

Distinct rings, vessels solitary, simple perforations, helical thickenings, round intervessel pits, intervessel pits alternate, vessel diameter 30-70 µm, parenchyma paratracheal, apotracheal diffuse and terminal, ray width 3-12 cells, homocellular with square and upright cells, pith with muscialge cells.

Xylem-Code

See annex

Phloem

Sclereids in tangentially arranged square groups, with ray dilatations, with many crystal druses in rays, with a few mucilage ducts.

Explanations

For explanations please see the Feature Characteristics.

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

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