* Thick, waxy leaves: Thick, waxy leaves help to reduce water loss by transpiration. Transpiration is the process by which water evaporates from the leaves of plants. By reducing transpiration, plants can conserve water.
* Deep root systems: Deep root systems help plants to access water from deep in the soil. This can be important in environments where the topsoil is dry but the subsoil is moist.
* Stomata that close during the day: Stomata are small pores on the leaves of plants that allow for the exchange of gases. During the day, when the sun is shining, stomata open to allow for photosynthesis. However, in environments with limited water availability, plants may close their stomata during the day to reduce water loss.
* Wilting: Wilting is a temporary loss of turgor, or firmness, in plant tissues. Wilting occurs when plants lose too much water. However, when water becomes available again, plants can often recover from wilting.
* Drought dormancy: Drought dormancy is a state of reduced metabolic activity that some plants enter in response to drought conditions. During drought dormancy, plants may lose their leaves and stop growing. However, when water becomes available again, plants can resume growth.
* Succulence: Succulence is a condition in which plants have thickened, fleshy stems, leaves, or roots that store water. Succulent plants are able to tolerate drought conditions by drawing on their stored water.
These are just a few of the many drooping adaptations that help plants to survive in environments with limited water availability.