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Morphology

N 80-150

Ecology

arid

Chorology

W-North America

Xylem

Distinct annual rings, ring porous, vessels in the latewood in radial groups and diagonal patterns, earlywood vessel diameter 120 – 150 mm, latewood vessel diameter 40-60 mm, vessel frequency 100-200 mm2, simple perforations, with helical thickenings. With vascular tracheids, fibers thin-to thick-walled, fibers with small pits, scanty and terminal paratracheal parenchyma, ray width 1-2 cells, rays heterocellular with 1-2 upright marginal cells, with prismatic crystals in ray cells, with large oil ducts in rays.

Xylem-Code

See annex

Phloem

Tangential layers of parenchyma and sieve-tubes, with crystal druses, with oil ducts.

Explanations

For explanations please see the Feature Characteristics.

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

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