Distribution of American Pondweed (Potamogeton nodosus) specimens in the ISM Herbarium |
Potamogeton nodosus Records for Morgan County, Illinois- ISM accession# 67785
- Collector: Roders, Dick
Date: 12 Jun 1964 - ISM accession# 67786
- Collector: Rogers, Dick
Date: 12 Jun 1964
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