Helianthus severus E. Watson
Helianthus severus E. Watson is a synonym sensu FNA Ed. Comm., 2006c of:
Helianthus ×laetiflorus Persoon, an accepted species name sensu FNA Ed. Comm., 2006c.
Helianthus severus E. Watson is a synonym sensu FNA Ed. Comm., 2006c of:
Helianthus ×laetiflorus Persoon, an accepted species name sensu FNA Ed. Comm., 2006c.