Iowa wildflower Wednesday: Ground cherry Bleeding Heartland How to Grow: Echinacea Growing and Caring for Echinacea Cashew nuts growing on tree at Thailand Stock Photo Alamy CAM (Crassulacean Acid Metabolism) Plant: CAM plants use this pathway to fix carbon dioxide, which helps them reduce water loss and photorespiration. They are often found in arid and dry climates. Examples Orchid: Plant Care & Growing Guide