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Plantaginaceae
Penstemon
Penstemon rydbergii var. aggregatus
Penstemon rydbergii var. aggregatus
No common name
K.Holmgren (Pennell) 1979 -
Brittonia 31: 106 (1979)
Specifications
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Synonyms
Penstemon aggregatus
Pennell
Penstemon rydbergii subsp. aggregatus
(Pennell) D.D.Keck