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Penstemon
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Penstemon x 'Pink Holly'
Penstemon acaulis
Penstemon alamosensis
Penstemon albertinus
Penstemon albidus
Penstemon ambiguus
Penstemon angustifolius
Penstemon arenicola
Penstemon aridus
Penstemon azureus
Penstemon caespitosus
Penstemon caespitosus var desertipicti
Penstemon californicus
Penstemon cardwellii 'Roseus'
Penstemon carnosus
Penstemon clutei
Penstemon cobaea
Penstemon confertus
Penstemon cyananthus
Penstemon cyananthus v subglaber
Penstemon davidsonii var menziesii
Penstemon davidsonii var praeteritus
Penstemon dolius
Penstemon duchesnensis
Penstemon eatonii
Penstemon ellipticus
Penstemon eriantherus
Penstemon fruticosus
Penstemon fruticosus 'Purple Haze'
Penstemon fruticosus var scoulei 'Alba'
Penstemon gracilis
Penstemon hallii
