The white grape variety comes from Portugal. The verbal horned name referring to the elongated grape shape means "cat's tail" (Rabo de Gato), some synonyms also suggest it with "monkey's tail" or "sheep's tail". Synonyms are Alva, Baldsena, Carrega Besta, Estreito, Estreito Macios, Muscatel Brava, Muscatel Bravo, Não Há, Rabigato Respigueiro, Rabisgatos, Rabo de Asno, Rabo de Carneiro, Rabo de Gato, Rodrigo Affonso, Rodrigo Alfonso, Roupeiro (Portugal); Puesta en Cruz (Spain). It must not be confused with the varieties Donzelinho Branco, Fernão Pires (with synonym Maria Gomes), Malvasia Fina or Rabo de Ovelha (with synonym Rabigato), despite apparently indicative synonyms or morphological similarities. According to DNA analyses carried out in 2011, there is a genetic link with the Tinta Francisca variety. The early to medium ripening vine is susceptible to both mildew and botrytis. It produces alcohol- and acid-rich white wines with aromas of lemon and orange blossom as well as subtle muscatel, which are used as blends. The variety was first mentioned in 1771. It is mainly cultivated in the Douro Valley; smaller stocks can also be found in the Vinho Verde area. In 2016, 1,969 hectares of vineyards were designated (Kym Anderson).