Lomatogonium rotatum (L.) Fr. ex Fernald
      
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Lomatogonium rotatum (L.) Fr. ex Fernald {81 988433 Swertia rotata L.} Gentianaceae
D.S. Correll, H.B. Correll, Aquatic Wetl. Pl. SW U.S.: , fig. 629 e,f (1972) [V. Frazier]