cup plant

(redirected from silphium perfoliatum l.)
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cup plant

n.
A perennial herb (Silphium perfoliatum) in the composite family, native to central and eastern North America and having showy yellow flower heads and opposite leaves whose bases fuse to form a cup around the stem.
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.