Distribution of White Snakeroot (Eupatorium rugosum) specimens in the ISM Herbarium |
Eupatorium rugosum Records for Washington County, Illinois- ISM accession# 39459
- Collector: Winterringer,glen S.
Date: 11 Oct 1951 - ISM accession# 49974
- Collector: Winterringer,glen S.
Date: 21 Sep 1956
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