Genus Erythrina refers to a group of flowering trees and shrubs that are commonly known as coral trees or erythrinas. There are several synonyms for this genus, including Erythrinus, Erythrine, and Corallodendron. These synonyms are often used interchangeably depending on the species in question and the context in which they are being discussed. The genus Erythrina is known for its striking red, orange, or pink flowers and its ability to adapt to a range of climates and environments. Some of the most popular species in this genus include Erythrina crista-galli, Erythrina senegalensis, and Erythrina falcata.