- Herbarium ID: NHIC
- Accession Number: MJO18908
- Scientific Name: Cirsium pitcheri (Torr. ex Eaton) Torr. & A.Gray
- Family Name: Asteraceae
- Location: Providence Bay, S shore of Manitoulin Island, Ont.
- District Located: Manitoulin
- Longitude/Latitude: 82.26694W / 45.66611 N
- Habitat: Sand dunes, with Agropyron psammophila, Arctostaphylos, Artemisia, Asclepias syriaca.
- Notes: 100+ plants seen, photos taken.
- Collector: M.J. Oldham & Mireille Delisle-Oldham
- Collection Number: 9582
- Collection Date: 7-Jul-1989
- Determined by: M. J. Oldham
- Annotation by: [no data]