Penstemon

 

Species and varieties
Penstemon ambiguus (Sand Penstemon, Bush Penstemon)
Penstemon baccharifolius (Rock Penstemon, Baccharis-Leaf Penstemon)
Penstemon barbatus (Beardlip Penstemon)
Penstemon centranthifolius (Scarlet Bugler)
Penstemon davidsonii
Penstemon digitalis (Talus Slope Penstemon)
Penstemon eatonii (Firecracker Penstemon)
Penstemon gloxinioides (Border Penstemon, Garden penstemon)
Penstemon heterophyllus ssp. purdyi
Penstemon palmeri (Palmer Penstemon, Balloon Flower)
Penstemon parryi (Parry's Penstemon)
Penstemon pinifolius (Pineneedle Beardtongue)
Penstemon pseudospectabilis (Desert Beard Tongue, Canyon Penstemon)
Penstemon rupicola
Penstemon spectabilis (Showy Penstemon, Royal Beard Tongue)
Penstemon strictus (Rocky Mountain Penstemon, Porch Penstemon)
Penstemon superbus (Superb Penstemon, Superb Beardtongue)
Penstemon thurberi (Desert Surprise, Thurber's Beardtongue)
Penstemon ambiguus var. thurberi synonym of Penstemon thurberi (Desert Surprise, Thurber's Beardtongue)
Penstemon cordifolius synonym of Keckiella cordifolia
Penstemon fremonti var. parryi synonym of Penstemon parryi (Parry's Penstemon)
Penstemon heterophyllus var. purdyi synonym of Penstemon heterophyllus ssp. purdyi
Penstemon laevigatus var. angulatus synonym of Penstemon digitalis (Talus Slope Penstemon)
Penstemon laevigatus ssp. digitalis synonym of Penstemon digitalis (Talus Slope Penstemon)
Penstemon puniceus synonym of Penstemon superbus (Superb Penstemon, Superb Beardtongue)

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