pl.n. (used with a sing. or pl. verb)
A perennial plant (Hymenoxys hoopesii) in the composite family, native to western North America, having large, rayed, yellow flower heads clustered in loose corymbs.
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.