Distribution of Horned Pondweed (Zannichellia palustris) specimens in the ISM Herbarium |
Zannichellia palustris Records for Warren County, Illinois- ISM accession# 67861
- Collector: Russell, Ken
Date: 24 Jun 1964 - ISM accession# 70832
- Collector: Russell, Ken
Date: 04 Aug 1965
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