Distribution of Common Waterweed (Elodea canadensis) specimens in the ISM Herbarium |
Elodea canadensis Records for Ogle County, Illinois- ISM accession# 19919
- Collector: Fell, Egbert W.
Date: 28 Jul 1945 - ISM accession# 71208
- Collector: Rock, Leo
Date: 16 Aug 1965
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