Distribution of Common Knotweed (Polygonum aviculare) specimens in the ISM Herbarium |
Polygonum aviculare Records for Dekalb County, Illinois- ISM accession# 34037
- Collector: Whitford, Philip B.
Date: 30 May 1940 - ISM accession# 51617
- Collector: Greeley, Harold W.
Date: 00 Sep 1898
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