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Morphology

tree 12 m

Ecology

hill and mountain zone, medium site

Chorology

E- North America

Xylem

Distinct rings, diffuse porous, vessels in radial rows of 2-6 and solitary, earlywood vessel diameter 40 - 60mµ, fibers with small unbordered pits with slit-like apertures (libiriform fibers), vessel frequency 80-150 mm2, intervessel pits scalariform, simple perforations, parenchyma marginal and apotracheal (rare), ray width 2-3 cells, rays homogeneus, cells procumbent and square, vessel ray pits round to oval in horizontal rows.

Xylem-Code

See annex

Phloem

Distinct tangential layers of thick-walled fibers and sieve cell/parenchyma. With ray dilatations. Groups of sclereids in the phloem and the cortex. With oil cells in the cortex and at the pith border.

Explanations

For explanations please see the Feature Characteristics.

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

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