]> GH barcode-01780963 United States of America Utah at mouth of Arch Canyon, where it joins Comb Wash, 18 miles southwest of Blanding. Twp. 37 S., R. 20 E., S. 25 Oenothera albicaulis Nuttall Nuttall 2020-07-21 14:57:14 A. J. Cronquist