17 October 2015.
Oklahoma, United States
Locality: south of Hwy 64, in Cimarron River bed south of E0145 Rd, southeast of Cargill Salt Works, CR 110, northwest of Freedom, Woods county
Coordinates: 36.7913, -99.2355
(Map it)
Elevation: 480m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Grassland on flat (small island) in riverbed, with deep soil derived from alluvium with Artemisia and Bouteloua.
Comment: pop size 1000; plants up to 1.5 m tall
Collector(s):