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Accession Number 105679 Scientific Name Cirsium arvense (L.) Scop. View Species Details » Common Name Canada thistle Family Asteraceae Collected By Wojtas, W. A. Date Collected 1979-07-16 Collector Number 00516 Place Collected North America: Canada, Manitoba, Riding Mountain National Park, Mount Agassiz Place Collected Details Riding Mountain National Park: Growing along both edges of an open roadside ditch. 0.1 Km E of the ski lodge along Mt. Aggassiz Rd. 50 46.0 N., 99 40.2 W. Latitude 50.766667 Longitude -99.67 Max Uncertainty Estimate (km) 2.427