What is "bosana"

The Bosana is the most common cultivar of olives in Sardinia. It makes up over 50% of the olive production on the island. The etymology of the name is uncertain, but it could refer to an alleged origin in the territory of Bosa. It is maintained, however, that the cultivar is of Spanish origin. It is used primarily for oil, but can also be eaten. The Bosana is a variety well adapted to less hospitable environments.