⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record gcc-62084, 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 A2447E9C-03D1-406A-93F3-ABD980E8FDF2
) with original publication details: 74 1972.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:119198-2
.