Stem of old man's beard. Polarised light micrograph through the cross section of the stem of old man beard (Clematis vitalba,family Ranunculaceae),showing the large wood vessels called the xylem (inner ring) through which water is transported. Medullary rays are continuous through the xylemeven after secondary thickening. Magnification: 16x | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Pasieka, Alfred |
Taille de l’image : | 4180 px × 4180 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |