U.S.A., Wyoming, Big Horn, Yellowtail Wildlife Management Area: small, spring-fed stream above Shoshone River, southwest of Lech Mayes Pond.
44.8612 -108.2174 +-1609m.
44.8612° N, 108.2174° W; uncertainty 1 mi.; T56N R94W S6
1125 meters
3690 ft.
Uncommon at margin of small spring-fed stream above the river, on rocky moist silt, 1% slope, north aspect. Occurs with Sonchus uliginosus, Rorippa nasturtium aquatica.