A plant that has adapted to dry conditions by opening its stomata during the night and closing it during the day. By doing this the plant saves water and stops CO2 from being absorbed by the leaves. At night while the stomata is open CO2 is absorbed and mixed together with organic acids. The organic acids that are made during the night are stored in the vacuoles until morning. Then when light is available for light reactions to supply the NADPH, CO2 is taken from the organic acids to become sugar. Pineapples are just one of the plants that belong to this family of CAM plants. Another example includes cactus.