]> GH barcode-01687462 United States of America Colorado North of Walden to Jackson County road 10, thence ca. 7 miles east to sand dunes. Physaria ludoviciana (Nuttall) O'Kane & Al-Shehbaz (Nuttall) O'Kane & Al-Shehbaz 2020-03-23 10:09:50 N. D. Atwood