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Until recently, the showy penstemon (including all other penstemons) was categorized as a member of the figwort family (Scrophulariaceae), which they clearly and closely look similar to. Recently, they have been reclassified as part of the plantain family (Plantaginaceae). As is often the case in botany, new research and genetic testing makes it easier for botanists to more accurately understand these plants which often means reclassification.
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Until recently, the showy penstemon (including all other penstemons) was categorized as a member of the figwort family (Scrophulariaceae), which they clearly and closely look similar to. Recently, they have been reclassified as part of the plantain family (Plantaginaceae). As is often the case in botany, new research and genetic testing makes it easier for botanists to more accurately understand these plants which often means reclassification.