11 September 2011.
California, United States
Locality: South bank of south fork of American River Bridge #25-33, along Highway 193, north of Placerville, El Dorado County.
Coordinates: 38.7655, -120.8217
(Map it)
Elevation: 289m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Roadside/riverside.
Number of plants sampled: 90
Comment: Population of thousands.
Collector(s):