Genus Lewisia is a group of flowering plants that belong to the family Portulacaceae. This genus includes about 19 species of plants that are native to North America. Some common names used for this genus include bitterroot, bittercress, and cliff lettuce. However, these names are often used for other types of plants as well, which can lead to confusion. Other synonyms that are used for Genus Lewisia include Lewisia rediviva, Lewisia cotyledon, and Lewisia brachycalyx. These synonyms can be helpful in identifying different species within this group of plants and in communicating about them with other botanists and enthusiasts.