250 indigenous varieties plus a handful of international; different names for the same variety, named after animals, people, and often hard to pronounce; field blends in a small, fractured vineyard ownership; maritime and continental climates: for such a small country, Portuguese wine is hard to pin down, but an understanding of the varieties helps. Here's an overview of some of the major white and black varieties and the regions they're grown in to gain a sense of Portuguese wine.