Plantae > Tracheophyta > Magnoliopsida > Lamiales > Plantaginaceae > Penstemon > Penstemon davidsonii Penstemon davidsonii (Davidson's penstemon; timberline penstemon)Synonyms: Penstemon menziesii davidsonii; Penstemon menziesii f. davidsonii (homotypic); Penstemon menziesii thompsoniae; Penstemon menziesii thompsonii; Penstemon menziesii var. davidsonii (homotypic)
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