17 September 2015.
Colorado, United States
Locality: along the Smith Ditch along Hwy 50, ~14 mi southeast of Grand Junction, Mesa county
Coordinates: 38.9100, -108.3738
(Map it)
Elevation: 1525m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Banks of operating irrigation canal, with deep soil from sedimentary parent material with Atriplex, Populus, Ericameria, and Xanthium.
Comment: pop size 100; plants up to 3.0 m tall
Collector(s):