Order Parietales refers to a group of dicotyledonous plants that consists of numerous species. However, the classification of some species within this group has undergone a considerable amount of revision. Some of the synonyms that have been used for the Order Parietales include the Chenopodiales, Portulacales, and Caryophyllales. The plants belonging to this order are characterized by their small flowers, succulent leaves, and the presence of betalains in their tissues. They are commonly found in arid regions and have adapted to thrive in environments with limited water availability. The Order Parietales is an essential group of plants both biologically and economically as they play a vital role in various ecosystems, and some species are used as food, medicine, or decorative plants.