penstemon Definition
any of various plants belonging to the genus Penstemon, of the figwort family, native to North America, having opposite leaves and tubular flowers.
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Summary: penstemon in Brief
The term 'penstemon' [pen-stuh-muh n] refers to any of various plants belonging to the genus Penstemon, of the figwort family, native to North America, having opposite leaves and tubular flowers.