Basketry of Mexico has its origins far into the pre Hispanic period, pre-dating ceramics and the domestication of crops. By the time the Spanish arrived, there were a number of indigenous forms, a number of which are still made today. These and products that the Spanish introduced form the combined tradition that remains today. Like other Mexican handcrafts, sales to tourists and collectors is important, but basketry is not as popular as other handcrafts. Basketry techniques and materials vary from region to region depending on the vegetation available (with about eighty species of plant use nationwide), with important traditions in Sonora, State of Mexico, Michoacán, Veracruz, Oaxaca and the Yucatán Peninsula.