- Herbarium ID: NHIC
- Accession Number: MJO76897
- Scientific Name: Carex atratiformis Britton
- Family Name: Cyperaceae
- Location: Polar Bear Provincial Park, near office and staff house, approx. 38 km SE of Winisk River mouth, Peawanuck, Ont.
- District Located: Kenora
- Longitude/Latitude: 85.4225W / 55.01417 N
- Habitat: Open, young Picea woods and openings.
- Notes: Robust clumps.
- Collector: M.J. Oldham & D.A. Sutherland
- Collection Number: 26347
- Collection Date: 12-Jul-2001
- Determined by: M.J. Oldham
- Annotation by: [no data]