In a nutshell, I believe: It's a variant of Purple Valinhos (or Purple of Valinhos, the city). In addition to its given name, it is cultivated heavily in other countries, known by the following names: San Piero, Brown Turkey, Wide Black, Douro Black, Black of Spain, Aubique Nooire, Portugal, Albicone, Rubicone and Brunswick
I can send to one of my coworkers in Brasil if you want a native speaker's translation, but what you will gain in knowledge of Portuguese, you will lose in knowledge of fig varieties ;)
Side tidbit from Wikipedia: Valinhos is a city and municipality (municipio) in the state of São Paulo, Brazil. It is famous for its purple fig, the theme of its annual Fig Fest.
(JG: Seriously, fig fest? Why don't we have those in the USA? ;))