]> GH barcode-01693176 United States of America Colorado along w side of muddy bank of Boulder and White Rock Ditch near Hayden Lake, NW 1/4 Sec. 21, T1N, R70W, near Boulder Airport, ca. 2 mi e of Boulder. Rorippa sylvestris (Linnaeus) Besser (Linnaeus) Besser 2020-04-10 09:25:11 R. L. Stuckey