| Specimen ID | 259471 |
| Group | Plants |
| Genus | Sagittaria |
| Species | rigida |
| Common Name | sessilefruit arrowhead |
| State | WA |
| County | Snohomish |
| Locality | Shadow Lake |
| Mapping Accuracy | Accurate |
| HUC8 Name | Snohomish |
| HUC8 Number | 17110011 |
| HUC10 Name | Quilceda Creek-Frontal Possession Sound |
| HUC10 Number | 1711001102 |
| HUC12 Name | Evans Creek-Snohomish River |
| HUC12 Number | 171100110202 |
| Map | |
| Collection Day | 2 |
| Collection Month | 9 |
| Collection Year | 2005 |
| Year Accuracy | Actual |
| Potential Pathway | unknown |
| Status | established |
| Reference 1 |
| Ref. Number: | 16085 |
| Author: | University of Washington. |
| Date: | 2007 |
| Title: | Burke Museum of Natural History and Culture: Herbarium. |
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| Comments | South side of Shadow Lake in Bob Hiermann Wildlife Park; very abundant around margins of lake, from high water mark to depth of ca. 1 ft |
| Record Type | Literature |
| Earliest Record | drainage |
| Museum Cat Number | WTU(unaccessioned) |
| Verifier | Legler, B. |
| Freshwater/Marine | Freshwater |
