- Herbarium ID: NHIC
- Accession Number: MJO62543
- Scientific Name: Carex rupestris All.
- Family Name: Cyperaceae
- Location: Polar Bear Provincial Park, fuel cache near Radar Site 415, approx. 10 km W of James Bay coast, 28 km SW of Hook Pt., Ont.
- District Located: Kenora
- Longitude/Latitude: 82.39917W / 54.75306 N
- Habitat: Dry sandy/gravelly beach ridge and adjacent tundra near radar installation.
- Notes: Rare; with Dryas integrifolia; new to Ontario.
- Collector: M.J. Oldham & D.A. Sutherland
- Collection Number: 25056
- Collection Date: 1-Sep-2000
- Determined by: M.J. Oldham
- Annotation by: A.A. Reznicek March 24.