Nuphar lutea
"Nuphar lutea" has a long history of usage as a valued food source. The field of archaeobotany documents this species’ tubers and charred seeds present in Vologda River digs in northern Russia since Early Neolithic times (ca 10,000 years BCE). The author of "Edible and Medicinal Plants" offered the following summary of this species’ wide usage in the Native American diet, where harvesting was done by canoe in late summer and early autumn: