Grindelia stricta var. angustifolia (A. Gray) M.A. Lane

Grindelia stricta var. angustifolia (A. Gray) M.A. Lane is a synonym sensu Bartoli & Tortosa, 2012 of:

Grindelia humilis Hooker & Arnott var. humilis, an accepted variety name sensu Bartoli & Tortosa, 2012.