17 October 2015.
Oklahoma, United States
Locality: along Hwy 11 ~2.5 mi east of N 2660 Rd, Salt Plains National Wildlife Refuge, east of Alva, Alfalfa county
Coordinates: 36.8087, -98.2224
(Map it)
Elevation: 355m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Herbaceous vegetation on alluvial flat between river courses, with deep soil derived from alluvium with Polygonum, Tamarix, and Sorghum.
Comment: pop size 100000; plants up to 4.5 m tall
Collector(s):