Distribution of Prairie Sundrops (Oenothera pilosella) specimens in the ISM Herbarium |
Oenothera pilosella Records for Jefferson County, Illinois- ISM accession# 57103
- Collector: Gerard, John H.
Date: 10 Jun 1959 - ISM accession# 73949
- Collector: Dolbeare, Ben L.
Date: 24 Jun 1966
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