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| Description: A Barrel cacti are covered by spines that reduce evaporative water loss. The cactus is a CAM plant. B Ocotillo, a desert shrub, grows leaves on its stems after a rain, then sheds them when conditions become dry again. Picture Stats: Views: 116 Filesize: 837.59kB Height: 1008 Width: 1300 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=47278 |