Fennel Fennel is the herb derived from the leaves and shoots of the Foeniculum vulgare, a perennial herb in the parsley family (Apiaceae). The fennel plant also gives us two spices from its pollen and fruit, and a seasoning vegetable from its bulb. Learn more about fennel here. Related Articles: What Are Spices and Herbs?What Can Spices and Herbs Do?The Most Expensive Spices in the WorldSaffronGlossary: Fennel SeedGlossary: Fennel PollenCarawayStar AniseAniseFennel Seed« Back to Glossary Index