In the late 20th century as Chilean wines became more popular, wine tasters around the world began to doubt the authenticity of wines labeled Merlot and Sauvignon blanc. The wines lack many of the characteristics and typicity of those grapes. Ampelographers began to study the vines and found that what was considered Merlot was actually the ancient Bordeaux wine grape Carménère that was thought to be extinct. The Sauvignon blanc vines were found to actually be Sauvignonasse, also known as Sauvignon vert, or a mutated Sauvignon blanc/Sémillon cross. In response to these discoveries several Chilean wineries began to import true Merlot and Sauvignon blanc cuttings to where most bottles labeled Merlot and Sauvignon blanc from vintages in the 21st century are more likely to be those varieties.