Distribution of Western Ragweed (Ambrosia psilostachya) specimens in the ISM Herbarium |
Ambrosia psilostachya Records for Mason County, Illinois- ISM accession# 35497
- Collector: Winterringer,glen S.
Date: 23 Aug 1950 - ISM accession# 46012
- Collector: Rexroat, Rollo T.
Date: 12 Sep 1954 - ISM accession# 51385
- Collector: Winterringer,glen S.
Date: 07 Sep 1956 - ISM accession# 80617
- Collector: Koelling, Alfred C.
Date: 24 Jul 1968 - ISM accession# 82854
- Collector: Winterringer,glen S.
Date: 07 Aug 1969 - ISM accession# 85041
- Collector: Fuller, George D.
Date: 15 Sep 1939 - ISM accession# 88302
- Collector: Dolbeare, Ben L.
Date: 14 Aug 1973 - ISM accession# 98980
- Collector: Shildneck, Paul
Date: 23 Sep 1972 - ISM accession# 106516
- Collector: Shildneck, Paul
Date: 28 May 1981 - ISM accession# 111827
- Collector: Schwegman, John E.
Date: 14 Sep 1971
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