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Craig C. Freeman +
Nuttall ex A. Gray +
Penstemon +
Colo. +, Utah +  and Wyo. +
2000–2300(–3700) m. +
Gravelly to clay soils, sagebrush shrublands, juniper woodlands, alpine meadows. +
Flowering May–Jul(–Aug). +
Proc. Amer. Acad. Arts +
Penstemon caespitosus var. caespitosus +
Penstemon caespitosus +
variety +