iris versicolor

action	analgesic, antirheumatic, cathartic, diuretic, emetic, laxative, panacea, sialogogue
common name	blue flag, flag lily, fleur-de-lis, flower-de-luce, harlequin blueflag, liver lily, poison flag, red root, snake lily, water flag, wild iris
family	iridaceae
indigenous use	appalachian, chippewa, cree, delaware, fox, iroquois, micmac, mohegan, montagnais, ojibwa, omaha, penobscot, ponca, potawatomi, rappahannock
native habitat	wetlands
range	acadia national park, apostle islands national lakeshore, cape cod national seashore, chesapeake and ohio canal, colonial national historic park, cuyahoga valley national recreation area, fire island national seashore, gateway national recreation area, gettysburg national military park, grand portage national monument, harpers ferry national historic park, isle royale national park, johnstone flood national memorial, pictured rocks national lakeshore, saint croix national scenic river, saratoga national historic park, shenandoah national park, sleeping bear dunes national lakeshore, turkey, us, voyageurs national park
use	poultice
used to treat	bladder ailments, bruises, burns, catarrh, cathartic, chronic gastritis, chronic vomiting, common cold, depurative, dropsy, ear ailments, enteritis, eye ailments, gastritis, heartburn, kidney ailments, liver ailments, migraine, orthopedic ailments, pulmonary ailments, respiratory ailments, skin ailments, sore, throat ailments, tuberculosis, vomiting, women's ailments
comments	The bruised fresh leaves are also sometimes used externally for burns and sores. Blue flag contains an acrid, resinous substance that acts on the gastro-intestinal tract, the liver, and the pancreas. It may also cause dermatitis in some people.