⚠ Version 1 of The Plant List has been superseded.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 frutescens in version 1.1 of The Plant List.
This name is a synonym of Pennellianthus frutescens .
The record derives from Tropicos which reports it as a synonym (record 29205470
) with original publication details: Trans. Linn. Soc. London 10(2): 259, pl. 6 259 1811.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:808101-1
.