Arkansas Yucca

hi, i have been looking into making herbal tinctures, but i cant find if this root is safe to use? Can anyone help.

Perhaps our smallest native yucca, native from South Central to North Central Texas, into Oklahoma and Arkansas, preferring prairie soil ...Read More(but is adaptable). The leaves are blue-green to yellow-green with white margins and the blooms are greenish-white in the spring. Performs well in garden settings as an understory plant (2' to 3' in bloom) requiring only well-drained soil.