BOTANY Bignonia Argyro Violacea. Merid America. (Serre chaude). Variety very decorative chromaticity changing of the leaves; which are born of a deep pink with green veins and eventually become a gray-green with silver-pink ribs. The genus Bignonia was dedicated in the nomenclature Abbot Bignon; librarian of Louis XIV. Table color lithograph from the opera "L'Illustration Horticole" Ambroise Verschaffelt by Charles Lemaire; Lithographic Printing Plant of L. Stroobant; Ghent; Belgium; in 1866.