- Herbarium ID: NHIC
- Accession Number: MJO11571
- Scientific Name: Oenothera perennis L.
- Family Name: Onagraceae
- Location: SE shore of island at NW tip of Long Point Island, near Whitefish Narrows, Lake of the Woods, Ont.
- District Located: Kenora
- Longitude/Latitude: 94.20056W / 49.46222 N
- Habitat: Bur oak rock barrens.
- Notes: Lake of the Woods, Ont., NW of Sioux Narrows.
- Collector: M.J. Oldham & W.D. Bakowsky
- Collection Number: 20191
- Collection Date: 18-Jul-1997
- Determined by: M.J. Oldham
- Annotation by: A.A. Reznicek 1998.