⚠ Version 1 of The Plant List has been superseded.
This name record (from Tropicos) is not included in version 1.1 of The Plant List. It is possible the same name is included from a different data source, to check this you can search for Penstemon fruticiformis in version 1.1 of The Plant List.
This name is a synonym of Penstemon fruticiformis var. amargosae .
The record derives from Tropicos which reports it as a synonym (record 29201342
) with original publication details: Amer. Midl. Naturalist 18: 801 801 1937.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:310033-2
.