Distribution of Western Sunflower (Helianthus occidentalis) specimens in the ISM Herbarium |
Helianthus occidentalis Records for Cass County, Illinois- ISM accession# 31824
- Collector: Winterringer,glen S.
Date: 28 Aug 1950 - ISM accession# 42162
- Collector: Rexroat, Rollo T.
Date: 03 Sep 1953 - ISM accession# 42365
- Collector: Rexroat, Rollo T.
Date: 17 Sep 1953 - ISM accession# 91029
- Collector: Tyson, W.stan
Date: 23 Jul 1980
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