Life (root) » Plantae (plants) » Tracheophyta (Vascular Plants) » Angiospermae (Flowering Plants) » Magnoliopsida (Dicots) » Asterales (asters, bellflowers, fanflowers, and allies) » Asteraceae (sunflowers, daisies, asters, and allies) » Asteroideae » Inuleae » Pterocaulon » Pterocaulon pycnostachyum (blackroot)