Starting off easy with the lemons we see piled high into pyramids at every grocery store: Lisbon lemons. These are what many of us think of as being the only lemon, or at least the most common one. It's basic and all-purpose — what more could you want? According to Minneopa Orchards, the Lisbon lemon tree descended from Portugal before moving to Australia and was then introduced to farmers in California in 1950.