11 September 2008.
Texas, United States
Locality: East side of the Brazos Bottoms Research Farm (operated by Texas A&M University), Burleson County.
Coordinates: 30.5286, -96.4064
(Map it)
Elevation: 67m.
Georeference protocol: Lat/Lon determined via Map location
Environment description: Fallow farmland.
Number of plants sampled: 150
Comment: Sampled 150 female plants of a population of approximately 10,000,000 plants. This is an unusually large and dense stand of this weed species.
Collector(s):