]> GH barcode-01687185 United States of America Oklahoma along Frisco R.R., 6 miles no. of Millcreek, Arbuckle limestone formation. Physaria gracilis subsp. nuttallii (Torrey & A. Gray) O'Kane & Al-Shehbaz (Torrey & A. Gray) O'Kane & Al-Shehbaz 2020-04-07 16:24:24 M. Hopkins, A. Nelson & R. Nelson