⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record kew-2784093, and has not been changed.
This name is a synonym of Echium humile subsp. pycnanthum .
The record derives from WCSP (in review) which reports it as a synonym with original publication details: Nouv. Mat. Fl. Atl. 1: 92 1874.