perennial
Penstemon ambiguus Torr. var. laevissimus (D.D. Keck) N.H. Holmgren
Penstemon ambiguus Torr. var. laevissimus (D.D. Keck) N.H. Holmgren
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Penstemon ambiguus Torr. var. laevissimus (D.D. Keck) N.H. Holmgren — seeds, tools & books
Native range
Native range not recorded for this plant. Often a non-native cultivar or naturalized garden plant.