Citrus could be a subcategory of fruit bitters, but because orange was the first and most famous fruit bitters, and because citrus fruit is the most common cocktail garnish, I find it clarifying to talk about citrus bitters on their own. Although all citrus bitters are citrus fruit forward, different flavors can dominate. They can differentiate by type of single fruit or they can be a blend of several different citrus fruits. But even within the confines of a single fruit, citrus bitters can be quite diverse. For example, an orange bitters may taste like a whole juicy fruit, or it may taste like orange zest, or the orange peel including its bitter pith, or orange oil, or orange marmalade, or fresh orange juice, or orange blossoms, or it may have the flavor of a specific orange, like Seville or bergamot. Types of citrus bitters include: lemon, lime, orange, grapefruit, yuzu, tangerine, mandarin, bergamot, Meyer lemon, Key lime, or blended citrus.