⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-50119022, with some changes.
This name is a synonym of Penstemon heterodoxus var. cephalophorus (Greene) N.H. Holmgren.
The record derives from Tropicos which reports it as a synonym (record 50119022) with original publication details: Leafl. Bot. Observ. Crit. 1(5): 79 79 1904.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:187259-2.