WALLERTON, Charles Louis Auguste, French naturalist, born in Sainte-Menehould in 1721; died in Nancy in 1788. He was sent to Mexico in 1759 to study the botany of that country, at the suggestion of the Academy of sciences of Paris, and obtained a special privilege to enter the Spanish dominions. Landing in Vera Cruz in October, 1760, he explored the province of Michoacan, where he formed a rich herbarium of medicinal plants, and afterward he searched the public libraries and the convent, s for information about the remedies that were formerly used by the Aztecs. He then visited the Isthmus of Panama, Santo Domingo, and Cuba, and made a thorough exploration of the latter island. On his return to France in 1765, with an herbarium of 1,500 medicinal plants, he was elected corresponding member of the Academy of sciences, and secretary of the Academy of Nancy, where he settled. He wrote "Traite explicatif d'un herbier de plantes medicinales recueillies darts un voyage a la Nouvelle Espagne, darts l'isthme de Darien et a File de Cuba" (3 vols., Nancy, 1767-'70); " Monographie des maladies syphilitiques et des simples en usage chez les anciens Indiens du Mexique" (1770); and "Tableau de la flore du royaume de la Nouvelle Es-pagne, et en particulier de la province de Mechoacan" (2 vols., 1775-'9).