- Herbarium ID: NHIC
- Accession Number: MJO77283
- Scientific Name: Rosa arkansana Porter
- Family Name: Rosaceae
- Location: Along abandoned Canadian National Railway (CNR) line, near Mack, approx. 14 km NNE of Upsala, Ont.
- District Located: not specified
- Longitude/Latitude: 90.37111W / 49.15417 N
- Habitat: Edge of woods near abandoned railway.
- Notes: Photo; growing with Rosa acicularis.
- Collector: M.J. Oldham & W.D. Bakowsky
- Collection Number: 26707
- Collection Date: 13-Aug-2001
- Determined by: M.J. Oldham
- Annotation by: A.A. ReznicekFeb. 24.