Distribution of Virginia Knotweed (Polygonum virginianum) specimens in the ISM Herbarium |
Polygonum virginianum Records for Schuyler County, Illinois- ISM accession# 50756
- Collector: Rexroat, Rollo T.
Date: 24 Aug 1956 - ISM accession# 91055
- Collector: Tyson, W.stan
Date: 31 Aug 1980 - ISM accession# 91649
- Collector: Tyson, W.stan
Date: 01 Sep 1980
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