Fig. 2

Transversal, tangential and radial sections and macerated of Tectona grandis wood. a Transition from earlywood (Ew) to latewood (Lw) marked by marginal parenchyma (arrow) and slight dilatation of the ray (R); vessels (V) solitary in earlywood and radially grouped in latewood; fibers (F) with small lumen and thick walled in the latewood (transversal section); b biseriate and multiseriate rays (R); fibers (F) and axial parenchyma (P) with 2–4 cells per parenchyma strand (tangential section); c rays (R), fibers (F), vessel elements (V) and axial parenchyma (P) (radial section); d vessel with tyloses (transversal section); e earlywood vessel element with terminal appendix simple perforation and alternate pits (arrow) (macerated); f libriform fibers (F); vascular tracheids with numerous pits (macerated)