| Specimen ID | 1441873 |
| Group | Plants |
| Genus | Persicaria |
| Species | hydropiper |
| Common Name | marshpepper knotweed |
| State | CA |
| County | Placer |
| Locality | 1 mile east of Weimar on Hwy 80 |
| Mapping Accuracy | Accurate |
| HUC8 Name | North Fork American |
| HUC8 Number | 18020128 |
| HUC10 Name | Lower North Fork American River |
| HUC10 Number | 1802012806 |
| HUC12 Name | Clipper Creek-North Fork American River |
| HUC12 Number | 180201280603 |
| Map | |
| Collection Day | 10 |
| Collection Month | 9 |
| Collection Year | 1971 |
| Year Accuracy | Actual |
| Potential Pathway | dispersed |
| Status | established |
| Reference 1 |
| Ref. Number: | 25610 |
| Author: | Calflora |
| Date: | 2021 |
| Title: | The Calflora Database: Information on California plants for education, research and conservation |
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| Reference 2 |
| Ref. Number: | 16045 |
| Author: | Alexander, J., S. Markos, J. Yost, R.L. Moe, E. Dean, and M. Nazaire. |
| Date: | 2016 |
| Title: | Consortium of California Herbaria (CCH) |
| Publisher: | Regents of the University of California |
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| Comments | Calflora observation ID: cch:RSA466396 |
| Record Type | Literature |
| Disposal | RSA424599A |
| Museum Cat Number | RSA424599A |
| Freshwater/Marine | Freshwater |
