Helianthus rigidus Desfontaines
Helianthus rigidus Desfontaines is a synonym sensu FNA Ed. Comm., 2006c of:
Helianthus pauciflorus Nuttall subsp. pauciflorus, an accepted subspecies name sensu FNA Ed. Comm., 2006c.
Helianthus rigidus Desfontaines is a synonym sensu FNA Ed. Comm., 2006c of:
Helianthus pauciflorus Nuttall subsp. pauciflorus, an accepted subspecies name sensu FNA Ed. Comm., 2006c.