Helianthus nuttallii var. subtuberosus (Britton) Boivin
Helianthus nuttallii var. subtuberosus (Britton) Boivin is a synonym sensu POWO of:
Helianthus giganteus Linnaeus, an accepted species name sensu FNA Ed. Comm., 2006c.
Helianthus nuttallii var. subtuberosus (Britton) Boivin is a synonym sensu POWO of:
Helianthus giganteus Linnaeus, an accepted species name sensu FNA Ed. Comm., 2006c.