]> GH barcode-01801404 United States of America Colorado San Juan National Forest; along U.S. Hwy. 550 at Molas Pass Summit, 6.2 miles south of Silverton; T40N, R8W, Sec. 12 or 13 Penstemon whippleanus A. Gray A. Gray 2022-05-05 16:09:59 R. R. Halse