The record derives from Tropicos
(data supplied on )
which reports it as an accepted name (record
29201523) with original publication details: Acad. Nat. Sci. Philadelphia Monogr. 1: 228–229, map 51 1935.
Full publication details for this name can be found in IPNI:
No synonyms are recorded for this name.
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This name record (from Tropicos) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Penstemon wherryi in version 1 of The Plant List.