Summary description from Wikipedia:

Penstemon caesius in languages:

English

San Bernardino Beardtongue

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Parent Taxon

• Penstemon

Sibling Taxa

• Penstemon azureus
• Penstemon caesius
• Penstemon cusickii
• Penstemon diphyllus
• Penstemon filiformis
• Penstemon floribundus
• Penstemon glandulosus
• Penstemon gracilentus
• Penstemon heterophyllus
• Penstemon kingii
• Penstemon laetus
• Penstemon leonardii
• Penstemon neotericus
• Penstemon papillatus
• Penstemon parvulus
• Penstemon platyphyllus
• Penstemon pudicus
• Penstemon purpusii
• Penstemon rhizomatosus
• Penstemon richardsonii
• Penstemon roezlii
• Penstemon scapoides
• Penstemon sepalulus
• Penstemon serrulatus
• Penstemon tiehmii
• Penstemon triphyllus
• Penstemon venustus

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