The red grape variety originates from Portugal. Synonyms are Amostrinha, Amostrinha Noir, Preto Martinho Aveiras, Preto Martinho do Oeste and Preto Martinho Ribatejo. It should not be confused with the Negramoll and Trincadeira Preta (Preto Martinho) varieties, despite seemingly suggestive synonyms or morphological similarities. According to DNA analyses last carried out in 2020, it is a presumably natural cross between Marufo x Carrega Tinto. However, this is based on only 20 DNA markers (see molecular genetics). The early-ripening vine produces red wines with moderate alcohol content, which are often blended with Castelão Francês. It is mainly grown in the Lisboa region. In 2016, 163 hectares of vines were reported (Kym Anderson statistics).