- Herbarium ID: NHIC
- Accession Number: MJO55804
- Scientific Name: Carex laeviconica Dewey
- Family Name: Cyperaceae
- Location: N shore Rainy River, at mouth of La Valie River (from mouth to upstream of first bridge), Ont.
- District Located: not specified
- Longitude/Latitude: 93.63806W / 48.53111 N
- Habitat: Wet silver maple/elm floodplain woods; ground layer dominant in wet silver maple woods.
- Notes: May be largest Ont. population.
- Collector: M.J. Oldham, W.D. Bakowsky, & J. Mercer
- Collection Number: 21881
- Collection Date: 13-Jun-1999
- Determined by: M.J. Oldham
- Annotation by: A.A. Reznicek March 24.