Dave’s Garden. 2022. Penstemon species, beard tongue, Eaton’s penstemon, firecracker penstemon, pride of the mountain (Penstemon eatonii). https://davesgarden.com/guides/pf/go/77014 [Accessed 2022 March 28].

Dave’s Garden. 2022. Penstemon species, beard tongue, Eaton’s penstemon, firecracker penstemon, pride of the mountain (Penstemon eatonii). https://davesgarden.com/guides/pf/go/77014 [Accessed 2022 March 28].

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