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Penthorum sedoides L.
Gordon C. Tucker and Aquatic Plants Class
U. S. A., Illinois, Coles
26-Sep-2002
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Perideridia americana (Nutt. ex DC.) Rchb.
Gordon C. Tucker
U. S. A., Illinois, Moultrie
30-May-2002
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Perilla frutescens var. crispa (Benth.) Deane
Gordon C. Tucker
U. S. A., Rhode Island, Washington
11-Sep-2003