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Ranunculus septentrionalis Poir.
Gordon C. Tucker and Bob Edgin
U. S. A., Illinois, Effingham
18-Apr-2003
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Ranunculus septentrionalis var. caricetorum (Greene) Fernald
M. Plouffe
U. S. A., Iowa, Hardin
5/9/1975
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Ranunculus uncinatus D. Don ex G. Don
Gordon C. Tucker
U. S. A., Washington, Grays Harbor
18-May-2002
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Rhamnus cathartica Pall.
Gordon C. Tucker and Edwin H. Horning
U. S. A., New York, Suffolk
31-Jul-1997