Summary description from Wikipedia:

Penstemon attenuatus in languages:

English

Sulphur Penstemon

English

Sulphur Beardtongue

Russian

Пенстемон оттянутый

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Parent Taxon

• Penstemon

Sibling Taxa

• Penstemon albertinus
• Penstemon albomarginatus
• Penstemon alluviorum
• Penstemon anguineus
• Penstemon arenarius
• Penstemon aridus
• Penstemon arkansanus
• Penstemon attenuatus
• Penstemon australis
• Penstemon bleaklyi
• Penstemon brevisepalus
• Penstemon calycosus
• Penstemon canescens
• Penstemon cinicola
• Penstemon confertus
• Penstemon deamii
• Penstemon decurvus
• Penstemon degeneri
• Penstemon deustus
• Penstemon digitalis
• Penstemon elegantulus
• Penstemon euglaucus
• Penstemon flavescens
• Penstemon gairdneri
• Penstemon glaucinus
• Penstemon globosus
• Penstemon gracilis
• Penstemon griffinii
• Penstemon harbourii
• Penstemon hesperius
• Penstemon heterodoxus
• Penstemon hirsutus
• Penstemon humilis
• Penstemon inflatus
• Penstemon kralii
• Penstemon laevigatus
• Penstemon laxiflorus
• Penstemon laxus
• Penstemon metcalfei
• Penstemon multiflorus
• Penstemon oklahomensis
• Penstemon oliganthus
• Penstemon ovatus
• Penstemon pallidus
• Penstemon peckii
• Penstemon pratensis
• Penstemon procerus
• Penstemon pruinosus
• Penstemon pseudoparvus
• Penstemon radicosus
• Penstemon rattanii
• Penstemon rydbergii
• Penstemon seorsus
• Penstemon smallii
• Penstemon spatulatus
• Penstemon subserratus
• Penstemon sudans
• Penstemon tenuiflorus
• Penstemon tenuis
• Penstemon tracyi
• Penstemon tubaeflorus
• Penstemon virens
• Penstemon washingtonensis
• Penstemon watsonii
• Penstemon whippleanus
• Penstemon wilcoxii

Child Taxa

• Penstemon attenuatus attenuatus
• Penstemon attenuatus militaris
• Penstemon attenuatus palustris
• Penstemon attenuatus pseudoprocerus

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