The SIDR Tree (Ziziphus spina-christi) is a small to medium-sized tree that is native to the arid regions of the Middle East, North Africa, and the southern part of the Arabian Peninsula. It is a member of the buckthorn family (Rhamnaceae) and is also known as the Christ's thorn or Jujube of Mecca.

The SIDR Tree is highly valued for its medicinal properties and has been used for centuries in traditional medicine to treat a wide range of ailments. The leaves of the tree contain high levels of flavonoids, which are known to have antioxidant, anti-inflammatory, and antimicrobial properties. The bark, leaves, and fruit of the tree are all used in traditional medicine to treat various conditions such as skin diseases, digestive disorders, and fever.

The SIDR Tree is also an important source of food and fuel in the arid regions where it is found. The fruit of the tree, which is a small, round, and yellowish-green berry, is edible and is used to make jams, jellies, and syrups. The tree's wood is also used for fuel, as well as for construction and furniture.

In addition to its medicinal and economic value, the SIDR Tree also plays an important role in the ecosystem of the regions where it is found. It is a hardy tree that can survive in extreme conditions, such as high temperatures and low rainfall. It is also a host for many insects and birds, making it an important part of the food chain.