the smut fungus. Nutrition Wild rice is relatively high in protein, the amino acid lysine and dietary fiber, and low in fat. Nutritional analysis shows wild rice to be the grain second only to oats in protein content per 100 calories. Like true rice, it does not contain gluten. It is also a good source of certain minerals and B vitamins. One cup of cooked wild rice provides 5% or more of the daily value of thiamin, riboflavin, iron, and potassium; 10% or more of the daily value of niacin, vitamin B6, folate, magnesium, phosphorus; 15% of zinc; and over 20% of manganese. Safety Wild rice seeds can be infected by the highly toxic fungus ergot, which is dangerous if eaten. Infected grains have pink or purplish blotches or growths of the fungus, from the size of a seed to several times larger. Archaeology of Minnesota wild rice Food source Anthropologists since the early 1900s have focused on wild rice as a food source, often with an emphasis on the harvesting of the aquatic plant in the Lake Superior region by the Anishinaabe people, also known as the Chippewa, Ojibwa and Ojibwe. The Smithsonian Institution's Bureau of American Ethnology published The Wild Rice Gatherers in the Upper Great Lakes: A Study in American Primitive Economics by Albert Ernest Jenks in 1901. In addition to his fieldwork interviewing members of various tribal communities, Jenks examined the accounts of explorers, fur traders and government agents from the early 1600s to the late 1800s to detail an "aboriginal economic activity which is absolutely unique, and in which no article is employed not of aboriginal conception and workmanship". His study further notes wild rice's importance in the fur-trading era because the region would have been nearly inaccessible if not for the availability of wild rice and the ability to store it for long periods of time. Wild rice's social and economic importance has continued into present times for the Anishinaabe and other north woods tribal members despite the availability of more easily obtainable food sources. Processing by various cultures This continued use of wild rice from ancient to modern times has provided opportunities to examine the plant's processing by various cultures through the archaeological record they left behind during their occupation of seasonal ricing camps. Early ethnographic reports, tribal accounts and historical writings also inform archaeological research in the human use of wild rice.