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