A plant of bogs, swamps, wetlands and shallow water of lakes and ponds, blueflag iris forms dense clumps about half a meter tall.  The showy blue-violet flower with erect petals and broad sepals dwells on the top of the stem.  Swordlike green-grayish leaves flank the slender stalk.  Most populations are distrubuted in the eastern and western parts of the state with scattered sites in central area.