Sui generis
Sui generis (; ) is a Latin phrase that means "of its (his, her, their) own kind; in a class by itself; unique."
Seutera
Seutera is a genus of plants in the Apocynaceae, first described as a genus in 1828. The name went unused until revived in 2006. It is native to Mexico, the West Indies, and the southeastern United States.