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Pith Rays in a Wood Cross-Section

To the left: Platanus acerifolia, with annual ring and a multilayered pith ray, diffuse-porous wood. To the right: Mahonia angustifolia (multilayered pith rays, vessels with extremely small lumina, diffuse-porous wood).

© Peter v. Sengbusch - b-online@botanik.uni-hamburg.de