⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record gcc-127879, with some changes.
This name is a synonym of Helianthus laevigatus Torr. & A.Gray.
The record derives from TICA which reports it as a synonym (record 72710363-591C-4FA5-903D-D8BF00ACC017) with original publication details: 376 1929.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:119237-2.