Fig. 3. Fibres of Quercus sp. and latewood tracheids of Metasequoia as seen in radial longitudinal views. A, Non‐compressed (normal) wood of Quercus. Arrows indicate fibres that have smooth walls. P, Parenchyma cell. B, Quercus wood that has been compressed to approx. 85 % of its original length. Arrows point to corrugated walls which also display slip planes (light lines). P, Shortened parenchyma cell. C, Latewood tracheids from the outermost ring (26) of PNJ Metasequoia tree. Arrows point to tracheids where plastic deformation is minimal or absent. D, Latewood tracheids of ring 14 of PNJ Metasequoia. Arrows point to corrugations in tracheid walls, and slip planes are evident. Bars = 50 µm.