⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record gcc-56598, and has not been changed.
This name is a synonym of Helianthus pauciflorus subsp. subrhomboideus (Rydb.) O.Spring & E.E.Schill..
The record derives from TICA which reports it as a synonym (record CFC5175C-A4EA-4542-BE06-7FD52F0A91D2) with original publication details: Flora of the Pacific Northwest 528 1973.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:119240-2.