| Specimen ID | 1693699 |
| Group | Plants |
| Genus | Persicaria |
| Species | hydropiper |
| Common Name | marshpepper knotweed |
| State | IL |
| County | Cook |
| Locality | 2 mile east of Libertyville, Illinois; northwest of where I-294 and Sanders Road intersect, west side of I-294. Arlington Heights |
| Mapping Accuracy | Accurate |
| HUC8 Name | Des Plaines |
| HUC8 Number | 07120004 |
| HUC10 Name | Willow Creek-Des Plaines River |
| HUC10 Number | 0712000405 |
| HUC12 Name | McDonald Creek-Des Plaines River |
| HUC12 Number | 071200040503 |
| Map | |
| Collection Day | 24 |
| Collection Month | 8 |
| Collection Year | 2005 |
| Year Accuracy | Actual |
| Potential Pathway | unknown |
| Status | unknown |
| Reference 1 |
| Ref. Number: | 27378 |
| Author: | Cranberg, C., and R. Keller |
| Date: | 2020 |
| Title: | Illinois Database of Aquatic Non-native Species |
| Publisher: | School of Environmental Sustainability, Loyola University Chicago |
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| Reference 2 |
| Ref. Number: | 28887 |
| Author: | Minnaert-Grote, J. (manager). |
| Date: | 2015 |
| Title: | Illinois Natural History Survey Herbarium (ILLS) |
| Publisher: | Prairie Research Institute, Illinois Natural History Survey |
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| Record Type | Specimen |
| Museum Cat Number | ILLS00078725 |
| Verifier | Great Lakes Invasives Network |
| Freshwater/Marine | Freshwater |
