- Herbarium ID: NHIC
- Accession Number: MJO7323
- Scientific Name: Cirsium pitcheri (Torr. ex Eaton) Torr. & A.Gray
- Family Name: Asteraceae
- Location: Sandy shore at mouth of Blue Jay Creek, Michael's Bay, Manitoulin Island, Ont.
- District Located: Manitoulin
- Longitude/Latitude: 82.09222W / 45.58944 N
- Habitat: Open sand with Salix cordata, Salix eriocephala.
- Notes: Approx. 75 rosettes, 1 fruiting plant, also with Artemisia compressus, Equisetum arvense, Potentilla fruticosa, Elymus canadensis, Scirpus pungens, +.
- Collector: M.J. Oldham
- Collection Number: 16770
- Collection Date: 16-Sep-1994
- Determined by: M.J. Oldham
- Annotation by: A.A. Reznicek 1995.