⚠ Version 1 of The Plant List has been superseded.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 newberryi in version 1.1 of The Plant List.
This name is a synonym of Penstemon newberryi subsp. sonomensis .
The record derives from Tropicos which reports it as a synonym (record 29206960
) with original publication details: Fl. W. Calif. 401 401 1901.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:187612-2
.