The red grape variety originates from Spain. Synonyms are Castañal, Mourisco and Rabo de Cordeiro. Until the beginning of the 20th century, it was widespread and very popular. According to DNA analyses carried out in 2009, there is a parent-offspring relationship to the variety Amaral (Caíño Bravo). The vine, which is almost extinct today, is cultivated in very small quantities on the Spanish-Portuguese border on the Spanish side of the river Miño. However, no stocks were reported in 2016 (Kym Anderson statistics).
Source: Wine Grapes / J. Robinson, J. Harding, J. Vouillamoz / Penguin Books Ltd. 2012