Helianthus nuttallii Torrey & A. Gray var. nuttallii
Helianthus nuttallii Torrey & A. Gray var. nuttallii is a synonym of:
Helianthus nuttallii Torrey & A. Gray subsp. nuttallii, an accepted subspecies name sensu FNA Ed. Comm., 2006c.
Helianthus nuttallii Torrey & A. Gray var. nuttallii is a synonym of:
Helianthus nuttallii Torrey & A. Gray subsp. nuttallii, an accepted subspecies name sensu FNA Ed. Comm., 2006c.