List of Penstemon species

This is a list of the species in the genus Penstemon. They are commonly called penstemons or beardtounges in English and species will often have a common name based on both of these names. As the subgenuses have some taxonomic uncertainty the species are arranged alphabetically by name in the lists. there are species and seven natural hybrids according to Plants of the World Online (POWO). The database World Flora Online (WFO) regards all the species listed by POWO as valid, but additionally lists two natural hybrids as species and five additional species as valid.

Penstemon species
These species of Penstemon are considered valid by both WFO and POWO with the exception of Penstemon grandiflorus. In both POWO and WFO it is regarded as a synonym of Penstemon bradburyi. However, P. grandiflorus continues to be widely used as the correct species name in North America including by the Flora of North America and the USDA Natural Resources Conservation Service PLANTS database (PLANTS). It is listed as P. grandiflorus in the table with the synonym noted.

Penstemon natural hybrids
these seven naturally occurring hybrids are valid according to POWO. Two are considered valid species according to WFO.

Additional Penstemon species
These five species are listed as accepted by World Flora Online, but are not accepted by Plants of the World Online.