]> GH barcode-02360677 United States of America Arizona 15 km E of Ashfork on road to Williams. Polygonum douglasii subsp. johnstonii (Munz) J. C. Hickman (Munz) J. C. Hickman 2021-11-29 07:43:48 B. Bartholomew, L. R. Landrum, H. W. Li & T. S. Ying