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                                    Abronia elliptica A.Nelson
                                 | 
                                R. J. Kass 927 | 
                                11 Jun 1982 | 
                                United States of America | 
                                Utah | 
                                Uintah Co. Point of Pines… | 
                                — | 
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                                    Abronia glabrifolia Standl.
                                 | 
                                R. J. Kass 2001 | 
                                09 May 1985 | 
                                United States of America | 
                                Utah | 
                                Grand Co. 2 mi NW… | 
                                — | 
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                                    Abutilon palmeri A.Gray
                                 | 
                                R. J. Kass 1136 | 
                                27 Mar 1983 | 
                                United States of America | 
                                Arizona | 
                                Pinal Co. Florence Jct. ca.… | 
                                — | 
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                                    Achnatherum lettermanii (Vasey) Barkworth
                                 | 
                                R. J. Kass 967 | 
                                07 Jul 1983 | 
                                United States of America | 
                                Utah | 
                                Millard Co. House Range Water… | 
                                — | 
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                                    Achnatherum swallenii (C.L.Hitchc. & Spellenb.) Barkworth
                                 | 
                                R. J. Kass 3774 | 
                                22 Jun 1993 | 
                                United States of America | 
                                Wyoming | 
                                Sublette Co. | 
                                — | 
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                                    Agrostis stolonifera L.
                                 | 
                                R. J. Kass 1838 | 
                                12 Jul 1984 | 
                                United States of America | 
                                Utah | 
                                Carbon Co. Skyline Mine, Eccles… | 
                                — | 
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                                    Agrostis stolonifera L.
                                 | 
                                R. J. Kass 4061 | 
                                09 Aug 1994 | 
                                United States of America | 
                                Utah | 
                                Juab Co. Salt Creek, about… | 
                                — | 
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                                    Alhagi maurorum Medik.
                                 | 
                                R. J. Kass 2498 | 
                                03 Jul 1986 | 
                                United States of America | 
                                Arizona | 
                                Navajo Co. About 17 miles… | 
                                — | 
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                                    Aliciella formosa (Greene ex Brand) J.M.Porter
                                 | 
                                R. J. Kass 2402 | 
                                19 Jun 1986 | 
                                United States of America | 
                                New Mexico | 
                                San Juan Co. About 6… | 
                                — | 
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                                | 
                                    Aliciella stenothyrsa (A.Gray) J.M.Porter
                                 | 
                                R. J. Kass 3859 | 
                                18 May 1994 | 
                                United States of America | 
                                Utah | 
                                Carbon Co. About 4 miles… | 
                                — | 
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                                    Alisma lanceolatum With.
                                 | 
                                R. J. Kass 4068 | 
                                11 Aug 1994 | 
                                United States of America | 
                                Utah | 
                                Duchesne Co. Lake Fork River,… | 
                                — | 
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                                    Allenrolfea occidentalis (S.Watson) Kuntze
                                 | 
                                R. J. Kass 5026 | 
                                31 Jul 1997 | 
                                United States of America | 
                                Utah | 
                                Salt Lake Co. About 1/2… | 
                                — | 
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                                    Allium textile A.Nelson & J.F.Macbr.
                                 | 
                                R. J. Kass 3255 | 
                                20 Jun 1991 | 
                                United States of America | 
                                Wyoming | 
                                Sweetwater Co. Haystack Buttes, ca… | 
                                — | 
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                                    Allium textile A.Nelson & J.F.Macbr.
                                 | 
                                R. J. Kass 759 | 
                                13 May 1982 | 
                                United States of America | 
                                Utah | 
                                Uintah Co. | 
                                — | 
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                                    Almutaster pauciflorus (Nutt.) Á.Löve & D.Löve
                                 | 
                                R. J. Kass 2180 | 
                                23 Sep 1985 | 
                                United States of America | 
                                Colorado | 
                                Mesa Co. Interstate 70 E… | 
                                — | 
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                                    Almutaster pauciflorus (Nutt.) Á.Löve & D.Löve
                                 | 
                                R. J. Kass 4118 | 
                                15 Aug 1994 | 
                                United States of America | 
                                Utah | 
                                Uintah Co. Lake Fork Creek,… | 
                                — | 
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                                    Ambrosia deltoidea (Torr.) W.W.Payne
                                 | 
                                R. J. Kass 1117 | 
                                27 Mar 1983 | 
                                United States of America | 
                                Arizona | 
                                Maricopa Co. 1 East of… | 
                                — | 
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                                    Amsonia eastwoodiana Rydb.
                                 | 
                                R. J. Kass | E. J. Neese 2239 | 
                                03 May 1986 | 
                                United States of America | 
                                Utah | 
                                Wayne Co. 0.5 miles E… | 
                                — | 
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                                    Amsonia eastwoodiana Rydb.
                                 | 
                                R. J. Kass 2185 | 
                                13 Apr 1986 | 
                                United States of America | 
                                Utah | 
                                San Juan Co. Arch Canyon,… | 
                                — | 
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                                    Androsace occidentalis Pursh
                                 | 
                                R. J. Kass 2027 | 
                                11 May 1985 | 
                                United States of America | 
                                Colorado | 
                                Mesa Co. near Moffat Gulch | 
                                — | 
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                                    Anemone tuberosa Rydb.
                                 | 
                                R. J. Kass 1171 | 
                                29 Mar 1983 | 
                                United States of America | 
                                Arizona | 
                                Santa Cruz Co. Hwy 189,… | 
                                — | 
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                                    Antennaria dimorpha (Nutt.) Torr. & A.Gray
                                 | 
                                R. J. Kass 1992 | 
                                09 May 1985 | 
                                United States of America | 
                                Utah | 
                                Emery Co. ca 9 mi… | 
                                — | 
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                                | 
                                    Antennaria rosea Greene subsp. rosea
                                 | 
                                R. J. Kass 1917 | 
                                04 Sep 1984 | 
                                United States of America | 
                                Utah | 
                                Summit Co. Uinta Mountains, Kings… | 
                                — | 
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                                    Antennaria rosea subsp. confinis (Greene) R.J.Bayer
                                 | 
                                R. J. Kass 1845 | 
                                12 Jul 1984 | 
                                United States of America | 
                                Utah | 
                                Carbon Co. Skyline Mine, Eccles… | 
                                — | 
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                                    Antennaria rosea subsp. confinis (Greene) R.J.Bayer
                                 | 
                                R. J. Kass 1845 | 
                                12 Jul 1984 | 
                                United States of America | 
                                Utah | 
                                Carbon Co. Skyline Mine, Eccles… | 
                                — | 
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