12 November 2010.
Louisiana, United States
Locality: Along north side of Lake Ramsey Road at intersection with Horse Branch Road, west of Highway 25, northwest of Covington, St. Tammany County.
Coordinates: 30.5311, -90.1594
(Map it)
Elevation: 13m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Roadside ditches.
Number of plants sampled: 150
Comment: Population of at least 200.
Collector(s):