Helianthus couplandii Boivin
Helianthus couplandii Boivin is a synonym sensu FNA Ed. Comm., 2006c of:
Helianthus petiolaris Nuttall subsp. petiolaris, an accepted subspecies name sensu FNA Ed. Comm., 2006c.
Helianthus couplandii Boivin is a synonym sensu FNA Ed. Comm., 2006c of:
Helianthus petiolaris Nuttall subsp. petiolaris, an accepted subspecies name sensu FNA Ed. Comm., 2006c.