Species:
Canada Thistle (Cirsium arvense) (Species ID: 4237) - View Species | Quad Details 
Date: 7/25/1961
Quad: Location crosses quads
County: Prince George's
Records: 704 total records, 40 for Prince George's Co., 28 for Washington East Quad
Observer: Smithsonian NMNH
Specimen: Yes
Publication: No
Processed by: Mike Ostrowski