1955] 



REVISION OF THE GENUS SAGITTARIA 



215 



FIG. 12." Di S «ibution of two species of SagiUaria fro* the south central ttated . States 



els «tr* x trv sii «? s? v,v^ * i ^ t w 



X V 3 . b, stamen, X 3. c, achene, X 3. 



