Parietales is a term used to describe a group of plants, mostly succulents, that belong to the family of Cactaceae. These plants are known for their ability to store water in their stems and leaves, which allows them to thrive in arid environments. Some common synonyms for parietals include cacti, succulents, and desert plants. Other synonyms include xerophytes, which refers to plants that are adapted to survive in dry conditions, and epiphytes, which refers to plants that grow on other plants or on objects like rocks or buildings. Overall, parietals are a fascinating group of plants that have adapted to thrive in some of the harshest conditions on Earth.