pen·ste·mon (pĕn-stēmən, pĕnstə-mən)
Any of numerous plants of the genus Penstemon, native to North America, having opposite leaves, variously colored flowers with a usually two-lipped corolla, and capsules containing many seeds. Also called beardtongue.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.