Erythrina, or Coral Tree, a genus of usually thorny shrubs and trees, native chiefly to India and tropical Africa and America. They are grown in greenhouses for their large clusters of scarlet or yellow flowers. The flowers usually open before the leaves appear. The fruits are pods of bright-red beans. The cardinal spear and the naked coral tree, both less showy than the tropical erythrinas, grow in the southeastern United States.

The genus Erythrina belongs to the pea family, Leguminosae. The cardinal spear is E. herbacea; naked coral tree, E. coralloides.