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Penstemon atwoodii

Penstemon attenuatus

Penstemon barnebyi

Penstemon bracteatus

Penstemon californicus

Penstemon ellipticus

Penstemon azureus

Azure penstemon

Penstemon breviculus

Penstemon caesius

Gomphogyne cissiformis

Penstemon calcareus

Limestone beardtongue

Penstemon calycosus

Longsepal beardtongue

Penstemon bicolor

Abelia chinensis var. aschersoniana

Penstemon confusus

Penstemon cyanocaulis

Penstemon × crideri

Penstemon deaveri

Penstemon degeneri

Penstemon diphyllus