Distribution of Giant Ragweed (Ambrosia trifida) specimens in the ISM Herbarium |
Ambrosia trifida Records for Cass County, Illinois- ISM accession# 20970
- Collector: Fuller, George D.
Date: 05 Oct 1946 - ISM accession# 42053
- Collector: Rexroat, Rollo T.
Date: 13 Aug 1953 - ISM accession# 105523
- Collector: Shildneck, Paul
Date: 22 Aug 1978
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