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Related to giant fennel: Foeniculum vulgare
Any of various tall plants of the Eurasian genus Ferula of the parsley family, having hollow stems, finely divided foliage, and large yellow inflorescences, especially F. communis, whose sturdy dried stalks were used by the ancient Greeks and Romans to make walking sticks and thyrsi. Some giant fennel species are toxic and are noxious weeds on grazing grounds.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.