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Morphology

tree up to 25m

Ecology

arid zone

Chorology

SW Northern America, Mexico

Xylem

Distinct rings, diffuse porous, vessels solitary and in groups, perforations simple and scalariform with mostly >10bars, intervessel pits opposite, earlywood vessel diameter 50 - 100µm, fibers thin to thick-walled, parenchyma apotracheal diffuse and paratracheal, ray width 5-10 cells, all ray cells prostrate, ray height >1mm, rays enlarged at the ring bondaries few ray cells with large prismatic crystals.

Xylem-Code

See annex

Phloem

Arched tangential layers of sclereids and parenchyma/sieve tube elements. Sieve tube elements mostly collapsed. Rays intensively sclerotised but interrupted by unlignified parenchyma cells. Much prismatic crystals.

Explanations

For explanations please see the Feature Characteristics.

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

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