⚠ Version 1 of The Plant List has been superseded.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 cyananthus in version 1.1 of The Plant List.

Penstemon cyananthus subsp. subglaber (A. Gray) Pennell is a synonym of Penstemon cyananthus var. subglaber (A. Gray) N.H. Holmgren

This name is a synonym of Penstemon cyananthus var. subglaber (A. Gray) N.H. Holmgren.

The record derives from Tropicos which reports it as a synonym (record 29201307) with original publication details: Contr. U.S. Natl. Herb. 20(9): 352 352 1920.