- Herbarium ID: NHIC
- Accession Number: MJO89793
- Scientific Name: Caltha natans Pall.
- Family Name: Ranunculaceae
- Location: Aulneau Peninsula, Arrow Lake, Lake of the Woods, Ont.
- District Located: Kenora
- Longitude/Latitude: 94.37556W / 49.31444 N
- Habitat: Sandy-rocky lakeshore, muddy shore at edge of marshy bay.
- Notes: Flowering; approx. 5 plants with Eleocharis acicularis, Sagittaria sp., Sparganium sp.
- Collector: M.J. Oldham
- Collection Number: 29858
- Collection Date: 16-Sep-2003
- Determined by: not specified
- Annotation by: [no data]