20 September 1996.
Iowa, United States
Locality: Approximately 2 miles west of Marshalltown on Highway 30 near mile marker 182, Section 8 or 9, Timber Creek Township, T83N, R18W, Marshalltown Quad, Marshall County.
Coordinates: 42.0333, -93.9583
(Map it)
Elevation: 274m.
Environment description: Wasteground.
Comment: Pop 8. Thousands of individual populations mixed with Amaranthus retroflexus, possible A. rudis x A. retroflexus hybrids (vouchers and silica gel material collected).
Collector(s):