⚠ Version 1 of The Plant List has been superseded.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 garrettii in version 1.1 of The Plant List.
This name is a synonym of Penstemon scariosus var. garrettii .
The record derives from Tropicos which reports it as a synonym (record 29201348
) with original publication details: Contr. U.S. Natl. Herb. 20(9): 353-354 353 1920.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:282303-2
.