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Morphology

H, 40 -100cm

Ecology

arid

Chorology

W-North America

Xylem

Distinct to indistinct rings, vessels in groups arranged in tangential layers, simple perforations, round intervessel pits, intervessel pits alternate, vessel diameter 50-70 µm, parenchyma paratracheal and apotracheal in aggregates, ray width 3-6 cells, homocellular with square and upright cells. Pith with muscilage canals.

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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