Asclepias longifolia subsp. hirtella (Pennell) J. Farmer & C.R. Bell

Asclepias longifolia subsp. hirtella (Pennell) J. Farmer & C.R. Bell is a synonym sensu FNA Ed. Comm., 2023c of:

Asclepias hirtella (Pennell) Woodson, an accepted species name sensu FNA Ed. Comm., 2023c.