Search for Penstemon australis returned 2,906 results.

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  1. species: Penstemon caesius A.Gray

  2. species: Penstemon tenuis Small

  3. species: Penstemon grinnellii Eastw.

  4. species: Penstemon euglaucus English

  5. species: Penstemon degeneri Crosswh.

  6. species: Penstemon × moronensis Crosswh.

  7. species: Penstemon gracilis Nutt.

  8. species: Penstemon albidus Torr.

    Synonym of Penstemon jamesii Benth.

  9. species: Penstemon similis A.Nelson

    Synonym of Penstemon jamesii Benth.

  10. species: Penstemon nyeensis Crosswh.

    Synonym of Penstemon kingii S.Watson