English edit

 
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Pronunciation edit

  • IPA(key): /ˈrɔɪəl ˈpɛnstɪmən/

Noun edit

royal penstemon (plural royal penstemons)

  1. (US) Penstemon speciosus.
    Hypernyms: beardtongue, penstemon
  2. (US) Penstemon spectabilis.
    Synonyms: showy beardtongue, showy penstemon
    Hypernyms: beardtongue, penstemon