A rupestrine plant is a type of plant that grows on or among rocks. Synonyms for rupestrine plants include lithophyte, saxicole, and rock plant. Lithophytes thrive in rocky outcrops, using the rocks as a source of moisture and nutrients. Saxicoles are plants that grow on rocks in rocky habitats, such as deserts or mountains. Rock plants are small, often succulent plants that grow in cracks and crevices on rocks. All of these synonyms describe plants that are adapted to harsh rock environments and have unique survival skills that allow them to grow in areas where few other plants can survive.