Lemon-lime

The Lemon Lime, or Sweet Lemon, is larger than the preceding, of an oblong roundish shape, with protuberances at the point, which is in some cases also puckered.

Source: wiktionary

Perhaps this is the place to recall the rise and fall of the so-called Perrine lemon, the hybrid lemon-lime which was introduced by the U. S. Department of Agriculture about 1931 in the hope that it might enable Florida to compete directly with California for the lemon trade.

Source: wiktionary

"There are many varieties of citrus including sweet and sour oranges, lemons, limes, lemon-limes, calomondin and pomelo."

Source: wiktionary