tropical rain forest
Conifer like wood but with large rays. Indistinct ring boundaries, vessels absent, tracheids with big round bordered pits (5-7 µm), arranged predominantly biseriate (1 to 3 seriate). Parenchyma apotracheal, diffuse. Rays are uniseriate and multiseriate (3 to 6 cells in width), heterocellular with 1 to 3 square and upright marginal cells. With sheet cells. Pits in marginal ray cells mostly arranged in axial rows. Ray-pits piceoid (bordered with slit-like apertures).
For explanations please see the Feature Characteristics Volume 1.
© 2005 WSL - F. Schweingruber, W. Landolt, last update 18.11.2010