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Sorbus sitchensis var. sitchensis M. Roem.
Gordon C. Tucker
U. S. A., Washington, Grays Harbor
18-May-2002
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Sorbus x thuringiaca (Ilse) Fritsch [aria × aucuparia]
Gordon C. Tucker
U. S. A., Illinois, Coles
12-Jul-2000
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Sorghum halepense (L.) Pers.
Gordon C. Tucker and Daniel M. Tucker
U. S. A., Illinois, Coles
8-Sep-2001