Cacti. These are golden barrel cacti (Echinocactus grusonii). A large specimen is at upper left. The smaller,extremely spiny specimens demonstrate why this cactus is sometimes called the step-mother's cushion. Cacti are plants that have evolved in arid environments. They have tissues adapted to minimise water loss. Cactus leaves are reduced to narrow spines,and the plant surface is covered in a thick,waxy outer layer. Many cacti also have a means of storing water | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Psaila, Philippe |
Taille de l’image : | 5053 px × 3490 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |