Barrel cactus spines (Echinopsis sp.). The spines of a cactus are its leaves. They arise from areoles (white),cushioned areas of tissue covering its surface. Areoles are a morphological feature unique to cacti | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wheeler, Dr. Keith |
Taille de l’image : | 4368 px × 2912 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |