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Related to hoptree: Ptelea trifoliata
A deciduous small tree or shrub (Ptelea trifoliata) of eastern North America, having trifoliolate leaves and flat waferlike seeds that were formerly used as a substitute for hops in brewing beer.
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.