⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record gcc-17394, and has not been changed.
This name is a synonym of Helianthus nuttallii subsp. rydbergii .
The record derives from TICA which reports it as a synonym (record 47CD5AC5-F270-4843-A0F8-20242B1585AB
) with original publication details: 1901.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:212251-1
.