⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record gcc-36820, with some changes.

Helianthus giganteus subsp. alienus (E.Watson) is a synonym of Helianthus giganteus L.

This name is a synonym of Helianthus giganteus L..

The record derives from TICA which reports it as a synonym (record 3566E40C-6DD5-4E2B-A792-4440D494AC18).