as Mantúo Laerén and Laerén de Rey. He describes this variety as follows: He says that this variety is grown in Sanlúcar, Xerez, Trebujena, Arcos, Espera, Moguer, Tarifa and Paxarete. He also mentions that it is grown in Valdepeñas and Manzanares, where it gives excellent wines for the production of exquisite spirits. The second reference by Roxas Clemente to Layrén states that this variety is synonymous to the Datileña. He describes it as: This grape, according to Roxas Clemente, is used for the production of raisins and to mix its must with that of the Ximénez variety, and in 1807 was grown in Sanlúcar, Xerez, Trebujena, Algeciras, Arcos, Espera, Moguer, Málaga, Motril, Albuñol, Adra y Paxarete. In 1885, Abela stated that Mantúo Laerén, apart from the areas mentioned by Roxas Clemente, was also grown in the region of Córdoba (known there as Mantúo Lairén) and in the areas around Cáceres, Ciudad Real, Málaga, Sevilla and Toledo, where it was known as Lairén. In 1914, García de los Salmones mentioned the cultivation of Lairén in Madrid, Villacañas (Toledo), Tarancón (Cuenca), Campo de Criptana (Ciudad Real), Frejenal de la Sierra (Badajoz), Montefrío (Granada), Baeza (Jaén), Coin (Málaga), Fiñana (Almería), Cazalla de la Sierra (Sevilla), Espera (Cádiz) and Córdoba. And as Airén in Albacete. In 1954, Marcilla defined the Airén variety as a typical vine in the La Mancha region, grown almost exclusively in that area. He described it as a Of the wine made from these grapes he states: He also mentions Lairén as being grown in Montilla (Córdoba) and in Extremadura. In 1965, Fernández de Bobadilla described Mantúo Laerén as: He says the following about its agronomic properties: In 1976, Hidalgo described Airén as follows: In the "Inventario Vitícola Nacional" by Hidalago and Rodríguez Candela (1971) Airén is cited as growing in Ciudad Real, Cuenca, Madrid, Málaga y Toledo. As Lairén is cited as growing in Córdoba, Jaén y Sevilla. As Valdepeñera or Airén grown in Albacete. In Jancis Robinson’s "Guía de Uvas para Vinificación" (1996) Airén is cited as the most grown variety of grape in the world: with 423.100 ha under cultivation, it exceeds Garnacha (Grenache) with 317.500 ha, Mazuelo with 244.330 ha, Ugni blanc with 203.400 ha, Merlot with 162.200 ha and Cabernet Sauvignon with 146.200 ha. She comments that it is the most common variety in Spain, comprising 30% of all vines. It is absolutely dominant in