Distribution of Giant Ragweed (Ambrosia trifida) specimens in the ISM Herbarium |
Ambrosia trifida Records for Lawrence County, Illinois- ISM accession# 14823
- Collector: Boewe, G.h.
Date: 09 Aug 1938 - ISM accession# 33352
- Collector: Winterringer,glen S.
Date: 17 Sep 1950
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