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Plantaginaceae
Penstemon
Penstemon xylus
Penstemon xylus
No common name
A.Nelson 1902 -
Bot. Gaz. 34: 31 (1902)
Specifications
Images
Synonyms
Penstemon tusharensis
N.H.Holmgren
Penstemon caespitosus subsp. suffruticosus
(A.Gray) D.D.Keck
Penstemon caespitosus var. suffruticosus
A.Gray