Oak burr on the trunk of an oak tree (Quercus robur). Burr (or burl) is deformed wood caused by cambium. Cambium is layers of tissue that are the source of cells for secondary growth. Burr can also be caused by continual cutting. Photographed in spring | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wheeler, Dr. Keith |
Bildgröße: | 2912 px × 4368 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |