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Similar Penstemon attenuatus, Penstemon venustus, Penstemon speciosus, Penstemon cyanocaulis, Penstemon angustifolius | ||
Penstemon rydbergii, commonly known as Rydberg's penstemon or meadow penstemon, is a perennial plant in the snapdragon family (Scrophulariaceae) that grows in damp, grassy meadows of the Great Basin of the western United States.
References
Penstemon rydbergii Wikipedia(Text) CC BY-SA