Wisteria is a middle period pattern introduced by Roseville Pottery in 1933. Standard colors are blue and brown, with blue being the most popular among collectors. The pattern, which was probably spelled Wistaria, features wisteria blossoms in relief on blue or brown backgrounds. The 16 shapes for the Roseville Aztec pattern include primarily vases and bowls. Wisteria was originally marked with foil labels, and some pieces have hand-written shape numbers.