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Plantaginaceae
Penstemon
Penstemon arkansanus
Penstemon arkansanus
Arkansas beardtongue
Pennell 1922 -
Proc. Acad. Nat. Sci. Philadelphia 73: 493 (1921 publ. 1922)
Specifications
Images
Synonyms
Penstemon pallidus subsp. arkansanus
(Pennell) R.W.Benn.
Penstemon wherryi
Pennell
Penstemon multicaulis
Pennell